It's the cr@ppy attempt at re-painting the aircraft for the Imperial War Museum, in the 1960s, after restoration. See also the Wellington in the background, now under its second restoration at RAF Cosford, before returning to RAFM Hendon.
This is probably at RAF St.Athan, where the former Enemy Aircraft Flight aircraft, and vintage British aircraft were stored, and where superb restoration jobs were carried out at the time - although someone obviously interpreted the colour scheme in an odd way at that time !!
The aircraft now wears a more authentic colour scheme, and now hangs from the ceiling at the IWM, Lambeth, London.
Incidentally, the scheme shown may well have been influenced by a 1/72nd scale model kit, from a US company, on release at that time !