Five years later ( ca 1949 that is ), the Norwegian salvage company raising the Tirpitz found an engine room bulkhead door on which one of the crew had painted the ship breaking through a rough sea underneath the words: 'Gegen England' (Against England). This bulkhead was mounted and an inscription, "Part of bulkhead of Tirpitz, sunk by Nos 9 and 617 Squadrons - 12th November, 1944, at Tromso. Presented to Bomber Command by brothers-in-arms, Royal Norwegian Air Force, in commemoration of friendship and co-operation during World War II" was added before it was placed on display at RAF Binbrook, the then home to both squadrons. Both Squadrons lay claim to the fact that it was their bombs that actually sunk the Tirpitz, and the bulkhead has been 'owned' by both squadrons over the years and continued to be the centre of inter-squadron rivalry until 2002. The bulkhead was the presented to the Bomber Command Museum, where it remains as a memorial to the crews of two of Bomber Command's most famous Squadrons.
http://www.raf.mod.uk/bombercommand/tirpitz.html