Warmtoast,
If by ' thing in the background ' you mean the one behind the Comet, how about Oxford or ( dare I say it ) Beaufighter ?, tail-sitter so not Devon, and larger.
There's something in front of the hangar too indistinct to make out, looks a touch Vampire-ish to me, or could even be a Devon, can't make it out properly.
Also there appears to be a blue/green & white ' bendy bus ' by the Comet- Red Ken must have pinched the idea !