Thanks Al: I'll go through the
http://www.convoyweb.org.uk/ database as well and find out how many tankers and other ships carrying avgas were destroyed in 1940 - last time I looked a couple of years ago I could only find one Inverdagle (9456 tons) which, as Barbi mentions, was sunk by a mine in (I think) the Bristol Channel? I know that some tankers diverted to France up to May or June 1940, accounting for some of the 100 Octane fuel used there.