[M sIMPSON]

Hi there,
From Martin Middlebrook's book on the Peenemunde attack;
1st wave attack 00.15-00.30 3 Group,4 Group and 33 Pathfinders.
2nd wave attack 00.31-00.42 1 Group and 18 Pathfinders.
3rd wave attack 00.43-00.55 5 Group,6 Group and 18 Pathfinders.
According to Middlebrook, only two of 5 Groups aircraft bombed early,so your uncle's aircraft was probably over the target somewhere between 00.43 and 00.55,British time.
The site of the crash,Anklam-Lassen, is about 50 km south of Peenemunde.
Hope this is of some use'
Regards,Mark.