Simon Glancey has submitted the following:
Sgt Lyall was killed when Avro Lancaster III JA933 60-S of 582 Squadron was lost on a mission to bomb railway yards at Laon. The Lancaster was intercepted by a Luftwaffe night fighter and exploded, crashing at Dives with the loss of all seven crew.
Royal Air Force Bomber Command Losses of the Second World War: 1944; W.R. Chorley; 1997; Midland Counties Publications; ISBN 0 904597 91 1, page 184
Tony Hibberd has added the following:
Lancaster JA933 60-S had departed Little Staughton at 2214 for Ops Laon.
It was intercepted at 2300M, 10-20km SE of Rosieres by a Night-Fighter captained by Nacht Jagd “Experten” Hptm Martin Drewes (Stab III/NJG1) and shot down at 0027 for his 21st Abschuss
Nachtjagd Combat Archive 1944 Part 2 Dr Theo Boiten
George Lyall is remembered in Ashington on A17.02 and A17.43