[1] After that first show, Coombs, together with Eardley Knollys and Ala Story, exhibited works by Pavel Tchelitchew, Ivon Hitchens, Frances Hodgkins, Christopher Wood and Victor Pasmore.
[3][4] When Story sold her share to Knollys, Knollys and Coombs started to exhibit works by Pablo Picasso, Amedeo Modigliani, Maurice Utrillo, Glyn Philpot (Philpot painted Coombs' portrait), Claude Monet, Pierre-Auguste Renoir, Paul Gauguin, Maurice de Vlaminck, André Derain and Amedeo Modigliani.
[4] He was among the young artists nicknamed the Cork Street Front, and exhibited with them in 1940 at the Special War-time Show hosted by the New Burlington Galleries.
[7] Coombs and Knollys befriended many clients like Lady Ottoline Morrell, Duncan Grant and Graham Sutherland.
[8][4] At the outbreak of World War II, Coombs joined the Royal Navy (HMS Caroline) and was killed during the Belfast Blitz by enemy action on 15 April 1941.