Working on memory here - and distant memory too, so corrections to my addled thoughts are welcome. Schrage Musik or "Jazz Music" was a very effective weapon and required the attacker to get underneath the bomber, where in Bomber command, there was no defensive turret or weaponry - but here, is a thought. I am sure that I read somewhere that one group of Bomber Command had their Lancs modified to have a single flexible downward firing gun, but that the commander of said group ordered these weapons to be removed, in order to allow a larger offensive payload.
Now, I don't know about this,but would welcome some clarification from others. Does the above ring true to anybody, or is it more a case of urban legend?
Martin Middlebrook wrote several absorbing and well researched books on the RAF bombing campaign - if you see any of them, go and buy. I did, but they are stuck in deep storage, so cannot refer to them at present.
Conan