Simon Glancey has submitted the following:
F/Sgt. Milburn was killed when Avro Lancaster III PB638 P4-O of 153 Squadron was lost on a mission to Stuttgart. The Lancaster crashed at Muchelbach, about 12 miles south east of Heidelberg, with the loss of all seven crew members.
Royal Air Force Bomber Command Losses of the Second World War: 1945; W.R. Chorley; 1998; Midland Counties Publications; ISBN 0 904597 92 X, page 55
He is remembered in Blyth on B42.23 and at New Delaval on N51.01