I have always had an interest in Bletchley, Enigma, etc since they came into the public domain. I was therefore somewhat blown away on taking up my post at a well known south coast Yacht Club to find that one of the members was the guy who took Enigma off U-110. At the end of a Members' lecture on the subject he showed with permission a clip of "U571", about to be released, pointing out that at the end there was a frame saying the film was a work of fiction, based on the exploits of a certain sub lieutenant RN, and which he had persuaded the producers to add.