He deals with a wide range of local government issues, including judicial review of post office closures, school reorganisation plans and school transport decisions. He deals with cases involving both local and regional government, including advising the Welsh Assembly Government and other Government Departments and local authorities, in England, Wales and in Northern Ireland. In 2000, he was appointed to the Attorney General’s list of approved Counsel and to the list of the Counsel General to the Welsh. He was called to the Bar in Northern Ireland in 2009. He appeared in the leading case on local authority powers in the Court of Appeal in Brent LBC-v-Risk Management Partners Ltd & London Authorities Mutual Ltd & Harrow LBC [2011] EWCA Civ 490.

Since working with the European Commission in Brussels in the 1990’s, he has long specialised in the law of the internal market as it affects the public sector, and in particular the free movement of goods and services and the EU public procurement regime. He has represented the United Kingdom Government on several occasions before the European Court of Justice in Luxemburg, e.g. case C-406/08 Uniplex (UK) Ltd-v-NHS Business Services Authority [2010] ECR I-0000. Moreover, in 2010, he was instructed to represent the successful appellants in the first ever case concerning public procurement to be heard before the Supreme Court in Brent LBC-v-Risk Management Partners Ltd & London Authorities Mutual Ltd & Harrow LBC [2011] UKSC 7.

He also practises in the areas of health and safety, safety aspects of food production and planning and environmental regulation. He has defended regulatory cases brought by the Health and Safety Executive against local authorities. He was instructed in the BSE Inquiry on behalf of the Welsh Office and, more recently, by the Welsh Assembly Government in the E-coli Inquiry.

He has prosecuted and defended the enforcement of planning regulations for and against local authorities and planning inspectors appointed by ministers and has represented the Environment Agency in its regulatory role under the EPA 1990. He has conducted numerous planning inquiries both on behalf of planning authorities and private applicants and objectors.

• R (Governors of Brynmawr Foundation School)-v-Welsh Ministers & Blaenau Gwent CBC [2011] EWHC 519 (Admin). Successfully defended the local education authority in claim against lawfulness of delegation by the Welsh Ministers of power to reorganise sixth form education in foundation schools and the exercise of that power by the local authority.
• Brent LBC-v-Risk Management Partners Ltd & London Authorities Mutual Ltd & Harrow LBC [2011] UKSC 7; [2011] LGR 169: Represented the Interested Parties on their successful appeal against the decisions of the High Court and Court of Appeal in respect of a claim for breach of the EU public procurement regime in relation to the establishment by various London authorities of an insurance mutual to provide insurance services. 
• Lancashire County Council-v-EWC Ltd [2010] EWCA Civ 1381; [2011] LGR 350. Successful appeal against finding of breach of the Public Contracts Regulations 2006 in respect of tender for waste management services
• Brent LBC-v-Risk Management Partners Ltd & London Authorities Mutual Ltd & Harrow LBC [2011] EWCA Civ 490. Represented the interested parties on appeal to Court of Appeal in respect of a local authority’s powers to enter into arrangements for mutual insurance under section 2 LGA 2000 and section 111 LGA 1972
• Case C-406/08 Uniplex (UK) Ltd-v-NHS Business Services Authority [2010] ECR I-0000. Reference to the European Court of Justice from the High Court (Leeds District Registry) for a ruling on the interpretation of the compatibility with EC law of procedural time limits under the Public Contracts Regulations 2006.