For more than 30 years, Jonathan was at the vanguard of the rediscovery of Modern British Art from his gallery in London's Park Walk, Chelsea.

In 2017 Jonthan was joined by his two sons Adam and Benjamin when the business relocated to a mews house in a private square in Clapham, where they may be visted by appointment only. 

The company continues to trade from its extensive inventory of paintings and sculpture as well as representing the estates of a number of leading twentieth centruy Modern British artists, such as, Ivon Hitchens, Kenneth Armitage and Ceri Richards alongside St. Ives artists Roger Hitlon, John Wells and Bryan Wynter.