Gwynne appointed as their guardians Roundell Palmer, 3rd Earl of Selborne and Douglas Hogg, 1st Viscount Hailsham.

[7] Gwynne therefore inherited Wootton Manor on his father's death in 1915 and with his wife commissioned their friend Detmar Blow to restore and extend the house.

Other artistic friends included the painter Cedric Morris, who painted Wootton in the 1920s and the writer and plantsman William Robinson.

His youngest brother, Roland Gwynne, later became Mayor of Eastbourne and was a close friend, and possible lover, of the society doctor and suspected serial killer John Bodkin Adams.

[9] Gwynne had had a weak heart all his life after having contracted rheumatic fever as a youth, but died suddenly of kidney failure on 12 October 1924, aged 51.