Simon Glancey has submitted the following:
Sgt. Allan was the Navigator on board Vickers Wellington III BJ973 AS-J of 166 Squadron which was lost on a mission to Wilhelmshaven. The Wellington crashed near Flensburg, with the loss of all five crew members.
Royal Air Force Bomber Command Losses of the Second World War: 1943;W.R. Chorley; 1996; Midland Counties Publications; ISBN 0 904597 90 3, page 47
Tony Hibberd has added the following:
Wellington BJ973 AS-J had departed Kirmington for Ops Wilhelmshaven
It was intercepted at 1800M over Borkholm, 10km SW of Suderlugum by a Night-Fighter captained by Fw Herbert Altner (V/NJG3) and shot down at 2055 for his 2nd Abschuss
Nachtjagd Combat Archive 1943 Part 1 Dr Theo Boiten
Robert Allan is remembered at Cambois on C6.03 and at Longbenton on L25.10