With Fairey "Battles" (and a few Blenheims) ?
Danny.
Obviously you know nothing about Bomber Command then! As of June 1940 there were some 467 bombers available. Aside of Battle and Blenheims, 3 Group had 8 Sqs of Wellingtons, 4 Group 6 Sqs of Whitleys and 5 Group 5 Sqs of Hampdens. Alas don't have the breakdowns of numbers available by type.