As you undoubtedly know, the raid was one of the Baedeker Raids. Straightforward retaliation by the Hun using the well known red guide book to distinguish important targets for destruction. There is a surprising amount on the net both in English and also in German. It's not too difficult to scan the German script, even if you don't know anything of that most beautiful language, to find bomb weights and aircraft types.
Here is some Olympian fin and games with a big one:
WWII bomb defused near Olympics site - CNN.com