One of the Mossies from 633 Sqdn languished at Bovingdon until about 1966 or '67. 613 GS from Halton had a detached flight there during 1967, and we shared the same hangar as this Mossie, so we all became well versed at climbing into it (unofficially that is!)
When the time came to fly the Mossie away, they thought there was something not quite right with the elevator balance, the controls feeling very heavy. Someone succeded in making a hole in the elevator skin, and several pints of (presumably) rainwater poured out!