 He is a specialist in 17th- and 18th-century British art and has written widely on this subject area.He has organised a number of exhibitions in collaboration with the Yale Center for British Art, the State Hermitage Museum and the State Kremlin Museums.A past Chairman of the National Art Collections Fund he was a Trustee of the National Portrait Gallery between 2012 and 2015, the Holburne Museum of Art, the Strawberry Hill Collections Trust, the British Sporting Art Trust and is a trustee of the Hermitage Foundation UK and the Ben Uri Gallery.