RR299 (HT-E) crashed at Baton in July 1996. IIRC the problem was a minor fuel problem (carburretor?) which led to one engine losing power at low airspeed during a wingover and thus to a spin.
There are actually two Mossies at Duxford - IWM has one on static display and The Fighter Collection has the IWM example from Lambeth in store fore eventual restoration to fly.
There is also one in the US owned by Kermit Weeks which may fly again eventually, one in Canada under rebuild and possibly one in OZ?