Tim is a former Senior Partner of Slaughter and May. He is Chair of WaterAid and the Economist Trust. Tim is a Senior Adviser at G3, Hudson and Sandler, Chatham House and CER and a member of the Advisory Board of Uria Menendez. He is also a member of the Development Committee of the National Gallery. He was formerly a member of the Board of Big Yellow Group and the National Theatre and of the Audit Committee of Wellcome Trust.