Simon K - You may be interested in a logbook which once came my way. It was a genuine logbook of WW2 period, but the entries were made in a very non-standard way. The chap was apparently a fighter pilot (I dont remember the type) flying in the period 1943 - 44. Instead of doing it month by month with summaries, they were all written continuously, without gaps. There were also no countersignatures, assessments etc
The chap seemed to be having a very active war, lots of dogfights and enemy aircraft shot down, etc, but when I got to the bit where he was himself shot down and crash landed in France in May 1944, but was back in England flying ops a week later the penny finally dropped. I don't think the most efficient resistance unit would have got him home quite that quickly.
I assumed this was the work of some AC2 from the cookhouse who had got hold of a blank logbook and invented it all to impress a girlfriend or mates, post war. Just went to show that there is nothing new in Walts.