Let me justify one more contribution by the fact that fewer and fewer survive of those who were there, and even of those who knew those who were there. Some of these sidelights on history can easily be lost.
I had read that sometimes they would do mods on a Lanc here and there to make it into a "gunship" (my terminology; I do not know what they called them).
The idea was to mount many extra machine guns in "one-off" firing points, send the aircraft off on a raid with no bombs but with appropriate extra air-gunners, and loaded down with all the ammunition it would carry. When attacked it would light up into a Christmas tree of tracer, to the shock and dismay of attacking fighters.
I put the question to an old friend of mine, ex-Lancaster pilot, DFC (died last year, alas) of the RCAF, and he confirmed they did indeed do that.