cliffnemo and regle:
Wonderful stuff, please keep it coming (and Dallas Police Dept - Al - too, welcome!).
As cliff says, Burtons had an advertising campaign and there were several versions, generally featuring a group photo (such as a wedding) with usually the central character missing with the explanation "Gone for a Burton" (beer). Obviously the similarity with crew rooms after Ops led to the phrase being adopted as a euphemism. Not old enough to have experienced the adverts at first hand, so will yield the floor to anyone better informed (wide enough net!!).
Regle, how can you suddenly drop in the info that on your wedding photo you had a bandaged face from a "hasty exit from a Halifax"? I don't recall you describing that incident!
Thanks to both (and others) for the wonderful evocation of real wartime Ops. We're practically in the cockpit with you!