Jack Castle
“Jack is intellectually strong and gets to grips with a matter very quickly. He is a confident advocate and has a good manner with judges when put on the spot.”
Legal 500 2025
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Jack has a busy practice in line with Chambers’ expertise, encompassing commercial, financial services, product liability, employment, procurement and public law/human rights. He acts in individual and group claims, and is ranked as a “Rising Star” in Administrative Law and Human Rights and Employment by the Legal 500.
His work ranges from matters concerning the identity of the pseudonymous founder of Bitcoin ‘Satoshi Nakamoto’ and intellectual property rights in its blockchain (one of The Lawyer magazine’s Top 20 Cases of 2024) to the classification of Universal Credit for the purposes of EU social security coordination and the ongoing power to refer questions to the CJEU (currently on appeal to the Supreme Court), and acting for a major German manufacturer in the NOx emissions litigation. Many of his cases involve issues of retained EU/assimilated law and the impact of the UK-EU Withdrawal Agreement. He is currently instructed in a number of applications to the European Court of Human Rights.
Jack also appears regularly as sole counsel in the High Court, and has particular experience of urgent pre-action and interim relief, including proprietary and freezing injunctions, particularly in commercial, breach of confidence and employee competition cases. He also frequently appears in administrative appeals before the Upper Tribunal, in Employment Tribunals and the county courts. A number of his cases have been reported on by the national press. Clients include individuals, corporations, public authorities, finance houses, NGOs and central government (as a member of the Attorney General’s ‘C’ Panel).
He is an editor of Practical Lending and Securities Precedents covering assignment and participation of loans, of the judicial and statutory review chapters of Butterworth’s Civil Court Precedents, and of the chapter on FCA regulation and authorisation in Consumer Credit Law and Regulation (2024).
Previously Jack was a Judicial Assistant in the Commercial Court, chiefly to Mrs Justice Cockerill (judge in charge of the Commercial Court), and a Visiting Lecturer in European Law at City Law School, University of London.
Before the bar Jack worked in the commercial art world. He is a trustee of Poetry London.
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Expertise
Commercial
Jack’s commercial practice includes complex disputes arising out of banking and finance, frauds, intellectual property and cryptocurrency, as well as confidential information, restraint of trade and general contractual matters.
Many of his cases arise in the context of partnerships, joint ventures or the employment relationship. He also acts in cases involving secret commissions, bribery, breach of fiduciary duty and unjust enrichment.
He frequently acts in applications for urgent and pre-action injunctions, including proprietary and freezing injunctions, in areas from team-move litigation to real property investments.
He is also instructed in commercial matters raising other areas of law, particularly public law and financial regulation.
In 2021 Jack was a judicial assistant in the Commercial Court, chiefly to Cockerill J (Judge in charge of the Commercial Court). He is an editor of Practical Lending & Security Precedents.
Representative cases
grid list-
Wright & Oths v BTC Core & Oths
Instructed in a claim concerning the identity of the pseudonymous founder of Bitcoin ‘Satoshi Nakamoto’ and intellectual property rights in its blockchain. This includes the ‘identity issue’ trial deciding the identity of Satoshi – [2024] EWHC 1198 (Ch) – one of The Lawyer magazine’s Top 20 Cases of 2024 (led by Terence Bergin KC).
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Wright v McCormack [2024] EWHC 1735 (KB)
Instructed in an application for a freezing order based on allegations that costs orders had been procured by fraud (led by Adam Baradon KC).
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Advice on fraud by an employee and ownership of intellectual property
As sole counsel, advised a large manufacturing concern concerning apparently fraudulent payments made by employees of over £600,000, potential computer hacking by those employees, and a dispute over intellectual property rights in software made during the course of employment.
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Advice on jurisdiction and choice of law
Instructed to advise on the correct construction of a contract for financial services with competing jurisdiction and choice of law clauses in favour of both English and Lithuanian law and courts.
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Breach of restrictive covenant and misappropriation of Facebook accounts
Instructed as sole counsel in the High Court in a claim involving a number of employees who retained work Facebook accounts following resignation in order to start a new competing business.
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Partnership dispute
Instructed as sole counsel in the High Court in a long-running dispute concerning a partnership formed to invest in residential property, involving allegations of misuse of partnership assets and breach of constructive trust. Jack secured urgent, without notice proprietary relief to prevent imminent disposal of partnership property ([2023] EWHC 2647 (Ch)).
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Team move in the recruitment industry
Instructed, as sole counsel, in a High Court pre-action injunction and claim involving misuse of confidential information on behalf of (and diversion of business to) a competitor, and breach of restrictive covenant.
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Breach of director’s duties and diversion of profits
Instructed, as sole counsel, in a High Court matter alleging appropriation of significant sums from the business by the company secretary and their accomplice, listed for an 8-day trial in 2024. Settled at mediation.
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Matter involving sale of artwork
Instructed as sole counsel in a contractual and consumer law dispute by a buyer of a significant work of Modern British Art.
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Breach of contract arising out of provision of agency workers
Instructed as sole counsel in a complex £500,000 breach of contract claim where a recruitment agency supplied agency workers to a client, which then recruited them as employees.
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Claim involving fire caused by electric bike battery
Instructed, as sole counsel, on behalf of a film production company and its director in a £1.5m claim arising out of a fire caused by the battery of an electric bike. Settled post-issue.
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Claim concerning allegedly defective title to goods bought at auction
Instructed for the Defendant purchaser of a piece of large plant machinery, defending a claim by a third party that it was auctioned without the consignor having good title.
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Claim against leaseholders under the Electricity Act 1989
Acted successfully for a “Big Six” energy supplier in relation to the liability of commercial lead-tenants for the consumption of insolvent lessees under the Electricity Act 1989.
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Dispute concerning “feed-in” tariffs
Instructed by a “Big Six” energy supplier in relation to a dispute concerning renewable energy feed-in tariffs.
Public and Regulatory
Jack undertakes the full spectrum of public law work as both junior and sole counsel. He is ranked in the Legal 500 for his work in Administrative Law and Human Rights.
His public law work spans a variety of areas, from regulation of financial services and healthcare to freedom of information, data protection and environmental law. This includes judicial review and statutory and administrative appeals processes, as well as civil claims against public authorities and the overlap between public and other areas of law.
Recent instructions include: applications to the European Court of Human Rights concerning discrimination based on marital status and legislative intervention in ongoing proceedings, acting for the Welsh Government in the Covid Inquiry, advising a well-known trade union on regulatory matters and freedom of speech concerns, judicial reviews relating to protected species, biodiversity and matters relating to renewable energy subsidies (see ‘Environmental’), a challenge to the lawfulness of inspections by a healthcare regulator and linked A1P1 damages claim (led by Patrick Green KC) and an important appeal regarding the classification of Universal Credit for the purposes of the EU social security coordination rules and the power to refer questions to Luxembourg post-Transition Period (led by Thomas de la Mare KC, permission to appeal to the Supreme Court granted).
He has a particular interest in social security and welfare benefits. He regularly represents claimants in the Upper Tribunal and accepts instructions on a publicly funded or pro bono basis.
Representative cases
grid list-
Simkova v Secretary of State for Work and Pensions [2024] EWCA Civ 419
Acting for a Slovakian national in an important appeal concerning entitlement to the child element of Universal Credit, raising issues concerning the interaction of Universal Credit with EU Regulation 883/2004 on the coordination of social security systems (led by Thomas de la Mare KC). Jack represented Ms Simkova before the Upper Tribunal as sole counsel ([2023] UKUT 44 (AAC)). Permission to appeal to the Supreme Court has been granted.
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C v A Regulator
Instructed in a commercial judicial review involving alleged apparent bias by a regulator’s inspector and a linked A1P1 damages claim (led by Patrick Green KC).
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R(L) v Service Complaints Ombudsman for the Armed Forces [2024] EWHC 1094 (Admin); [2024] A.C.D. 76
Appeared as sole counsel for the interested party, the Ministry of Defence, in a judicial review concerning the jurisdiction of the Service Complaints Ombudsman for the Armed Forces.
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Advice on bulk data collection
Advised a public authority on bulk data collection and the impact of Article 8 ECHR and UK GDPR (led by Christopher Knight).
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Secretary of State for Work and Pensions v MA [2024] UKUT 131 (AAC); [2024] P.T.S.R. 1243
Appeared as sole counsel in an Upper Tribunal appeal concerning whether selling stolen goods is considered “work”, and if money obtained therefrom is “income”, for the purposes of entitlement to income-related Employment and Support Allowance.
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Re: Regulation of Advertising
Instructed, as sole counsel, by a well-known trade union in potential judicial review proceedings arising out of potential regulatory action relating to advertising, raising issues of jurisdiction (including a “precedent fact” challenge) and Article 10 ECHR. The regulator dropped its investigation following pre-action correspondence.
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Union Member v Trade Union
Instructed as sole counsel in a claim concerning the right to be represented by a lawyer in union disciplinary proceedings under the Defendant Trade Union’s rules.
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LR (by her litigation friend RR) v Secretary of State for Work and Pensions
Instructed as sole counsel in the Upper Tribunal in a matter concerning the renewal process for Disability Living Allowance and Thlimmenos discrimination.
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Private Healthcare Provider v CQC
Acted for a private healthcare provider challenging conditions placed on registration by the CQC in breach of legitimate expectations and the Tameside duty. Notice withdrawn after grounds of appeal filed.
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GP v Secretary of State for Work and Pensions
Acting in an appeal to the Upper Tribunal for a pensioner deprived of state pension while held on remand and subsequently given a suspended sentence, raising statutory interpretation and human rights issues (Articles 6, 7, A1P1 and 14).
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Advice on duties under the Care Act 2014 in public and private law
Advised a local government body on interlinking matters involving real property, irrationality and substantive legitimate expectations relating to its duty/power to offer a property disregard or Deferred Payment Agreement to an adult in a care home who held an interest in her home as a tenant in common.
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A v University B
Instructed, as sole counsel, by a Paralympic athlete alleging disability discrimination in the assessment and non-award of their degree and the University’s internal appeals process. Settled.
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Negligence/A1P1 and Article 14 claim against a professional regulator
Claim in negligence and breach of A1P1, both independently and read with Article 14, concerning availability of professional indemnity insurance.
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Advice on representative claim against compensation scheme
As sole counsel, advised potential claimants in a proposed action against a compensation scheme.
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Advice regarding approval for public office
Assisted leading counsel in advising a government department on issues surrounding special approval to a public office, including the court’s approach to review of religious judgments and Article 6 ECHR.
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Gibbs v Information Commissioner and Financial Reporting Council (EA/2017/0284)
Represented the Appellant in an appeal concerning the applicability of the Freedom of Information Act to the FRC’s scheme for the regulation of statutory auditors in the immediate aftermath of the 2008 financial crisis.
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Gibbs v Information Commissioner and FCO (EA/2017/0258 & 0275)
Represented the Appellant in a 3-day Freedom of Information Act appeal relating to the decision to approve export of a warship to an individual in the Niger Delta with a history of militancy. Raised issues of prejudice to international relations, ongoing criminal investigations and the Article 6 rights of potential defendants, judicial deference to Government witnesses, and the scope of the Article 10 right to receive information.
Financial Services
Jack is regularly instructed by major UK lenders for his expertise in financial services, as well as representing investors and customers.
This includes disputes and advisory work concerning, for example, the execution and enforcement of secured and unsecured loans, asset financing, guarantees, financial product mis-selling, secret commissions and fiduciary duties owed by brokers and advisors, and matters involving suspension of bank accounts due to fraud and/or money laundering.
He has a particular interest in financial regulation, including matters involving compliance with FSMA, the RAO, the Financial Promotions Order, the Consumer Credit Act 1974, and civil consequences for regulatory breaches under FSMA.
In 2022 he was seconded to the FCA to assist with investigations into the adequacy of advice given to customers transferring out of Defined Benefit pensions.
Jack is editor of the ‘Assignment & Participation of Loans’ chapter of Practical Lending & Security Precedents and has recently completed a chapter on FCA regulation and authorisation in the consumer credit sphere.
Representative cases
grid list-
Advice on jurisdiction and choice of law
Instructed to advise on the correct construction of a contract for financial services with competing jurisdiction and choice of law clauses in favour of both English and Lithuanian law and courts.
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Appeal against "fit and proper" assessment for AML purposes
Instructed as sole counsel by HMRC defending an appeal against the “fit and proper person” decision under the Money Laundering, Terrorist Financing and Transfer of Funds (Information on the Payer) Regulations 2017.
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A v B Ltd and C
Instructed as sole counsel in a claim against a claims management company alleging breach of the general prohibition and seeking compensation under section 26 FSMA.
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Advice on s.138D action and FOS complaint
Advising an investor on potential breaches of the FCA Handbook and the FPO by an Appointed Representative with a view to recovering their investment in a failed £2m property venture.
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FCA Defined Benefits Pensions Enforcement
Assisted the FCA in a large-scale enforcement action arising out of inadequate provision of advice surrounding transfers out of defined benefits pension schemes.
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Claim against major online bank
Instructed as sole counsel defending a major online bank against an alleged breach of the Quincecare duty and breach of the Payment Services Regulations 2017 arising out of an alleged authorised push-payment fraud.
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Claim for frustration of a credit agreement
Acting for a major lender in a claim alleging frustration of a credit agreement due to the COVID-19 pandemic.
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Claim in breach of fiduciary duty against two major lenders
Acting for a bank in a claim for breach of fiduciary duty and unjust enrichment alleging secret commissions were made to a broker.
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Advice on regulatory authorisation
Advising on the process by which authorisation to purchase a bank could be objected to due to suspected money laundering.
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A financial services group action
Assisted in advising on a potential state aid and/or public law defences to the setting of interest rates on certain financial products.
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Advice on FCA compensation
Assisted in a matter concerning whether redress paid for prospective Plevin claims under the FCA scheme barred further civil claims.
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Gibbs v Information Commissioner and Financial Reporting Council (EA/2017/0284)
Represented the Appellant in an appeal concerning the applicability of the Freedom of Information Act to the FRC’s scheme for the regulation of statutory auditors in the immediate aftermath of the 2008 financial crisis.
Group Actions
Jack has assisted leading counsel on procedural and substantive aspects of domestic and international group actions.
He has experience of group claims involving financial mis-selling, medical devices and medications, consumer rights, environmental disasters and international tort claims, including what is reportedly the biggest group action in English legal history arising from the collapse of the Fundão dam in Brazil.
This has included issues ranging from choice of law and management of the claimant group to novel points in the law of tort, parent company liability, and the immunity of international organisations.
He has also advised and assisted in advising on the preliminary stages of a number of group actions, including considerations of the most suitable substantive causes of action to certain group claims, organisation of the claimant cohort, strategy, tactics, and potential funding issues.
Representative cases
grid list-
Mercedes-Benz NOx Emissions Group Litigation
Instructed for the Mercedes-Benz Defendants in what is thought to be the largest GLO proceedings currently before the English courts. Jack recently appeared (led by Helen Davies KC) in the “KBA Trial”, concerning whether the English court is bound by decisions taken by the Kraftfahrt-Bundesamt pursuant to the EU regime before, during and post-Brexit.
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Medical device group action
Instructed by the manufacturer in a claim concerning a permanent birth control device (led by Toby Riley-Smith KC).
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A consumer rights group action
Instructed to advise on a group claim involving deception by traders relating to past usage of second-hand goods raising complex issues of European-derived law (including whether certain domestic legislation is an implementation of an EU directive and indirect effect). This included advising on the suitability of certain causes of action for group litigation and organisation of a claimant cohort, as well as strategy, merits and quantum (led by Nazeer Chowdhury).
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Group action concerning mis-selling of property investments
Assisted in advising the claimant group following the collapse of a US property investment scheme, on issues including forum and choice of law, attribution of knowledge to a company, joint liability in tort and practical issues concerning how to arrange the claimant group.
Employment
Jack regularly acts in High Court employment-related commercial matters involving team moves, misuse of confidential information, breach of contract and restrictive covenant, and intellectual property issues arising in this context, including applications for interim injunctive relief and civil frauds involving diversion of company funds and property.
He also appears as sole counsel in statutory Employment Tribunal claims for unfair dismissal, whistleblowing, discrimination, failure to make reasonable adjustments, holiday pay and unlawful deduction of wages. This includes potential lifetime loss of earnings cases with values exceeding £750,000.
He has further experience of the TUPE regime, worker status, the agency workers regulations, pensions and bonus disputes, and public law issues arising in employment matters. He represents both employees and employers.
He is also instructed on non-employment discrimination matters, including relating to provision of services and education, and novel claims arising out of the employment relationship.
Jack has been ranked in the Legal 500 for a number of years for his employment work.
Representative cases
grid list-
Hilton Foods Solutions v Wright [2024] I.C.R. 862; [2024] I.R.L.R. 532
Acted successfully as lead counsel in the EAT in a matter concerning the meaning of “sought” to take parental leave in the Maternity and Parental Leave etc. Regulations 1999.
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Breach of restrictive covenant and misappropriation of Facebook accounts
Instructed as sole counsel in the High Court in a claim involving a number of employees who retained work Facebook accounts following resignation in order to start a new competing business.
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R(L) v Service Complaints Ombudsman for the Armed Forces [2024] EWHC 1094 (Admin); [2024] A.C.D. 76
Appeared as sole counsel for the interested party, the Ministry of Defence, in a judicial review concerning the jurisdiction of the Service Complaints Ombudsman for the Armed Forces.
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Team move in the recruitment industry
Instructed, as sole counsel, in a High Court pre-action injunction and claim involving misuse of confidential information on behalf of (and diversion of business to) a competitor, and breach of restrictive covenant.
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Breach of director's duties and diversion of profits
Instructed, as sole counsel, in a High Court matter alleging appropriation of significant sums from the business by the company secretary and their accomplice, listed for an 8-day trial in 2024. Settled at mediation.
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Claim for failure to properly report to pension scheme
Instructed in an action for negligent failure by an employer to give a correct report of the reason for an employee’s dismissal to the pension scheme, leading to loss of pension from that scheme (led by Adam Heppinstall KC).
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Advice on jurisdictional issues relating to maternity leave and pay
Advised an organisation on the jurisdictional scope of rights to maternity leave and maternity pay, including issues relating to social security coordination under the Withdrawal Agreement.
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Breach of contract arising out of provision of agency workers
Instructed as sole counsel in a complex £500,000 breach of contract claim in which a recruitment agency supplied agency workers to a client, which then recruited them as employees.
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Health and safety/whistleblowing claim against private hospital
Successful in a 4-day constructive dismissal and detriment claim against a private healthcare provider on behalf of a therapist who was refused permission to conduct remote consultations in the first national Covid lockdown. Case was covered in the Evening Standard.
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Disability and victimisation claim
Instructed in a complex disability discrimination claim involving a data breach arising out of the claimant being allowed to work from home, and allegedly being forced to make a false confession.
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Disability discrimination claim against national charity
Instructed to represent the ex-Director of Communications in a claim for discriminatory dismissal due to the effects of hypothyroidism, depression and anxiety in a 5-day final hearing. Matter settled before trial.
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Positive discrimination advice
Advised a company on its ability to positively discriminate on grounds of race/ethnic background in recruitment.
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Claim against English company by employee of foreign branch
Unlawful deduction of wages claim involving issues of “limb (b) worker” status and the applicability of foreign law.
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Discrimination, whistleblowing and health and safety claim against a government department
Acted for the successful Claimant in a 4-day liability hearing involving complex and interlinking constructive discriminatory, whistleblowing and health and safety dismissal claims. Also successfully required the respondent to give specific disclosure of documents the existence of which it had previously denied. Claim settled shortly before the remedy hearing for a six-figure sum, including a substantial sum for loss of pension and provisions accounting for foreign taxation.
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Advice regarding approval for public office
Assisted leading counsel in advising a government department on issues surrounding special approval to a public office, including the court’s approach to review of religious judgments and Article 6 ECHR.
EU and International
Jack has extensive experience of international law, European Union law and retained EU law matters as they arise across his areas of practice.
Before joining chambers Jack was Visiting Lecturer in EU Law at City, University of London, and has been involved in a number of cases raising EU law issues as both sole and junior counsel, ranging from social security coordination to consumer rights, database rights (in the context of the Bitcoin blockchain) and employment law matters. He is also involved in a matter concerning the interpretation of the power to refer questions to the CJEU under Article 158 of the Withdrawal Agreement.
He is also frequently involved in matters concerning the ECHR, in particular Articles 6, 8, 14 and Article 1 of the First Protocol, generally in regulatory and social security contexts. He is currently involved in a number of applications to the Strasbourg court.
Representative cases
grid list-
Mercedes-Benz NOx Emissions Group Litigation
Instructed (led by Helen Davies KC) in the “KBA Trial”, concerning whether the English court is bound by decisions taken by the Kraftfahrt-Bundesamt pursuant to the EU regime before, during and post-Brexit.
-
Wright & Oths v BTC Core & Oths
Instructed in a claim concerning the identity of the pseudonymous founder of Bitcoin ‘Satoshi Nakamoto’ and intellectual property rights in its blockchain. This includes the ‘identity issue’ trial deciding the identity of Satoshi – [2024] EWHC 1198 (Ch) – one of The Lawyer magazine’s Top 20 Cases of 2024 (led by Terence Bergin KC).
-
C v A Regulator
Instructed in a damages claim under A1P1 and linked judicial review alleging apparent bias in the regulatory process (led by Patrick Green KC).
-
Hilton Foods Solutions v Wright [2024] I.C.R. 862; [2024] I.R.L.R. 532
Acted successfully as lead counsel in the EAT in a matter concerning the meaning of “sought” to take parental leave in the Maternity and Parental Leave etc. Regulations 1999.
-
Re: Regulation of Advertising
Instructed as sole counsel by a well-known trade union in potential judicial review proceedings arising out of potential regulatory action relating to advertising, raising issues of jurisdiction and Article 10. The regulator dropped its investigation following pre-action correspondence.
-
Simkova v Secretary of State for Work and Pensions [2024] EWCA Civ 419
Acting for a Slovakian national in an important Court of Appeal matter concerning entitlement to the child element of Universal Credit, raising issues concerning the interaction of Universal Credit with EU Regulation 883/2004 on the coordination of social security systems (led by Thomas de la Mare KC). Jack represented Ms Simkova before the Upper Tribunal as sole counsel ([2023] UKUT 44 (AAC)).
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Advising on the Trade and Cooperation Agreement and Northern Ireland Protocol
Advising central government on the subsidy implications of grants to improve social housing, under the TCA, Subsidy Control Act 2022 and Northern Ireland Protocol.
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GP v Secretary of State for Work and Pensions
Acting in an appeal to the Upper Tribunal for a pensioner deprived of state pension while held on remand and subsequently given a suspended sentence, raising statutory interpretation and human rights issues (Articles 6, 7, A1P1 and 14).
-
A consumer rights group action
Instructed to advise on a group claim involving deception by traders relating to past usage of second-hand goods raising complex issues of European-derived law (including whether certain domestic legislation is an implementation of an EU directive and indirect effect) (led by Nazeer Chowdhury).
-
Negligence/A1P1 and Article 14 claim against a professional regulator
Instructed, as sole counsel, in a claim in negligence and breach of A1P1, both independently and read with Article 14, concerning availability of professional indemnity insurance.
-
A financial services group action
Assisted in advising on a potential state aid and/or public law defences to the setting of interest rates on certain financial products.
Environmental
Jack has experience of environmental cases in public, private and criminal law contexts, including habitat and species protection, climate change, nuisance, rights to water, drainage and flooding, as well as of the regime concerning access to environmental information.
He recently assisted in advising on a potential public law challenge to the regime of subsidy for low-carbon electricity generation.
Jack is a pro bono member of the Environmental Law Foundation.
Representative cases
grid list-
Claim in noise nuisance
Instructed in a claim between long leaseholders alleging noise nuisance due to defective sound insulation installed before either leaseholder was resident.
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Dispute concerning “feed-in” tariffs
Instructed by a “Big Six” energy supplier in relation to a dispute concerning renewable energy feed-in tariffs.
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Advice on challenging adoption of a local plan
As sole counsel, advised a resident on a potential public law challenge to adoption of a local plan due to the presence of EU-protected species.
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Advice on response to planning application
As sole counsel, advised residents on public law grounds to oppose grant of planning permission, including incompatibility with the local plan, loss of open space and overloading of local amenities, drainage/flooding issues and inadequate consideration of impacts on protected species, habitat, and climate change objectives.
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Advice on drainage and flooding issues
Assisted in advising on potential easements to drain into neighbouring land and liability for flooding.
Procurement and Subsidy Control
Jack has a particular interest in procurement, and acts for contracting authorities and economic operators in procurement and subsidy control matters.
In 2020 he was seconded to the Government Legal Department’s ‘Covid Cell’, advising on a variety of important procurement and state aid matters relating to the Covid-19 pandemic, including procurement of mass testing capacity and vaccines.
He is a procurement specialist member of LexisNexis’ Q&A Panel.
Representative cases
grid list-
Advising an economic operator on a £150m procurement
Advising an economic operator in a potential challenge to the marking and award of a contract in the justice sector.
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Advising on the TCA and Northern Ireland Protocol
Advising central government on the subsidy implications of grants to improve social housing, under the TCA, Subsidy Control Act 2022 and Northern Ireland Protocol.
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Advising Government departments on Covid-19 response
Seconded to the Government Legal Department to advise a range of Government departments on procurement, state aid and commercial law issues associated with the UK’s pandemic response.
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A financial services group action
Assisted in advising on a potential state aid and/or public law defences to the setting of interest rates on certain financial products.
What the directories say
“Jack is intellectually strong and gets to grips with a matter very quickly. He is a confident advocate and has a good manner with judges when put on the spot.”
Legal 500 2025
‘Jack is a very effective cross-examiner and an impressive, unperturbed advocate.’
Legal 500 2024
News and articles
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Instructing Jack Castle
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- Attorney General’s Panel of Junior Counsel to the Crown, C Panel (2023)
- Centre for Women’s Justice, Legal Reference Panel
- Panel Member, Advocate
- Contributing Editor of ‘Judicial Review, Statutory Review and Habeas Corpus’ in Butterworth’s Civil Court Precedents
- Author of the ‘FCA Authorisation’ chapter in Consumer Credit Law and Regulation (2024)
- Editor of ‘Assignment & Participation of Loans’ in Practical Lending & Security Precedents
- Contributor to Lexis®PSL Public Law
- Procurement Specialist Contributor to LexisNexis Q&A panel
- ALBA
- COMBAR
- Environmental Law Foundation
- Employment Lawyers Association
- Financial Services Lawyers Association
- Young Public Lawyers Group
Education
- BA English Literature, Bristol University, First Class
- MSt. English Literature Post-1900, University of Oxford, Distinction
- GDL, City Law School, University of London, Distinction
- BPTC, City Law School, University of London
Scholarships
- Major Scholarship (BPTC), Inner Temple (2017)
- Duke of Edinburgh Entrance Award, Inner Temple (2017)
- Postgraduate Scholarship (BPTC), City Law School (2017)
- Kalisher Trust Advocacy Training Programme (2017)
- Exhibition (GDL), Inner Temple (2016)
- Postgraduate Scholarship (GDL), City Law School (2016)
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