Hi, 

Halifax Mk III LW522 (coded MH-J) from No 51 Sqn and Halifax Mk III LV946 (coded NP-K) from No 158 Sqn took part at the Operation on Tergnier's marshalling yard 18/19th April 1944. Both aircrafts collided certainly after the bomb run but not sure as witnesses said that one of the aircrafts had always the bombs when they collided causing a big explosion in air. 

All airmen were buried in Grand Seraucourt cemetery. 
The accident was over the village of Ly-Fontaine (Aisne). The mayor wants to honor the fallen and I need to find pictures of these Halifaxes and crew members to write their story in the news bulletin of the village. I search also crew members' relatives, names of the fallen are below: 

Halifax LW522 MH-J 51 Sqn 

Sgt C. Shackleton 
Sgt C. Christie 
F/S E. O. D. Yorke 
Sgt D. W. Kennedy 
Sgt P. Latchford 
Sgt W. J. Gilchrist 
F/S F. Taylor 

Halifax LV946 NP-K 158 Sqn 

F/O W. A. Hughes RCAF 
Sgt O. Mc D. Brown 
F/S F. Salmond 
F/O B. A. Trewin RCAF 
W/O J. A. Leaver RAAF 
F/S J Heyes 
F/O R. Stakes 

Thanks for you help. 
Phil