His portrait of Graham Greene hangs in the National Portrait Gallery ( London ) and that of Paddy Ashdown in the House of Commons of the United Kingdom .
Palliser has had many solo and group exhibitions across Europe and in the United States .
Palliser 's portrait of Graham Greene hangs in the National Portrait Gallery ( London ) and that of Paddy Ashdown in the House of Commons of the United Kingdom .
Palliser has had many solo and group exhibitions across Europe and in the United States .