ACW, as I said, co s were different.
In fact on my first tour our plotter was 'late' and joined us after the following course. We had a wg cdr, top bloke, destined for a staff job who did the course before going to Bomber.
Later our AEO voluntarily withdrew from flying and a year or so later our plotter was picked up to be ADC to AOC 224 Gp. In contrast, like some WW 2 crews we had one that came fully formed from Valiants with the Valiant Co now their captain - John B-Y.
PS
And from curiosity, our plotter is the NAv in the first photo one the following link
http://www.cosfordapp.net/200/220.htm