- Second World War (1939-1945)
- FS (now P/O)
- No. 630 Squadron, Royal Air Force
"Flight Sergeant Allen has successfully completed 29 operations against Germany and occupied territory. During his tour, which included four raids on Berlin, three on Stuttgart, and others on Koenigsburg, Augsburg and Leipzig, he has consistently brought back photographic proof of his skill as an Air Bomber, and of his excellent co-operation with the other members of the crew.
He has always endeavoured to increase his efficiency by careful study of the results of each raid, and he has employed his constantly improved technique in bombing with great precision against very heavily defended and difficult targets. He is strongly recommended for the non-immediate award of the Distinguished Flying Medal."