Sgt. Richardson was serving with 207 Sqdn. He was a crew member of Lancaster III ME473 EM-N which took off from Spilsby on a training exercise and was in a mid-air collision with another Lancaster aircraft over Lincolnshire.
Royal Air Force Bomber Command Losses of the Second World War: 1945; W.R. Chorley; 1998; Midland Counties Publications; ISBN 0 904597 92 X