Philip specialises primarily in international aspects of taxation, which covers both corporate and private client matters. He has a particular interest in taxation and the European Convention on Human Rights, and is the author of a book on Double Taxation Conventions. He is also a Visiting Professor at the Faculty of Law, Oxford University. Philip is a former member of the Council of the CIOT and remains a member of several committees of the CIOT and of the International Tax Sub-Committee of the Law Society.