Hello,
Sgt Len Manning failed to return on 18/19 July, 1944 (not 18 April, 1944), attacking Revigny (the third raid). He successfully evaded, despite being badly burned about the face.
See:
Massacre over the Marne The RAF Bombing Raids on Revigny, July 1944.
Clutton-Brock,Oliver.
Sparkford:P.S.L.,1994.
pp.10, 111, 174-6 & 240.
and ...
https://www.aerosteles.net/steleen-bassevelle-lancaster
see also ... BCL5/336.
Col.