BEagle,
Thanks for setting me right about Grimsdike/Benskin. It was a long time ago !
The exam "B" held no terrors for me, for it was (for a variety of reasons) never in my sights. There was a general belief at one time that, in order to get a PC (and, by extension, having a hope of S/Ldr), you needed to (a) be a member of the RAF Club and (b) have played rugby for (at least) your Station (Group/Command/RAF so much the better).
Probably sour grapes !
Danny.