The mural was safely removed from the wall of Tree Stores, near Dorchester, prior to the site redevelopment; the premises were formerly a YMCA hostel, and before that part of the RAF Warmwell base. See the Facebook page RAF Warmwell Memorial Weekend 29-31 August 2014 for more pictures.
low-res version of image by Colin Shaw
reproduced for comment/critique
To add to the list of factoids: it's not clear where the idea came from that the creature depicted, called "Gruffie", is a gremlin. Gremlins have been subject to reimaginings over the years, but the original RAF ones of the time Beaumont painted this were depicted as imp-like - not bird-like - creatures. In my view, with his feathers, beak and ear-tufts, he's clearly a griffin, and the name Gruffie is consistent with that.
|"Gruffie" (detail) compared with heraldic griffin|