Sixty years ago some of the QFIs who had flown Lancs used to sing a song based on "Old King Cole" which went something like this. Sorry but can't remember all of it.
Our wingco was a merry old soul, a merry old soul was he
He called for his kites in the middle of the night and he called for his pilots three
Every pilot was a fine type, a very fine type was he. There's none so fair as can compare with the boys of ??????
"We don't give two fu**s" said the pilots-
(repeat Our wingco etc) called for his navigators
"fifteen miles off track" said the navigators
Called for his engineers
"we've got ten pounds boost"said the engineers
Called for his bomb-aimers
"left, left, steady dummy run" said the bomb-aimers
Called for his signallers
"dah diddy dah diddy dah" went the signallers
Called for his tail gunners
"corkscrew corkscrew left" said the tailgunners
There was a mid upper gunner too but I can't remember what he did.
Perhaps somebody can fill in the blanks.