Saturday, at a secret (and very windy) airbase in the east
Let me guess. It starts with "Con" and ends with "ingsby"?
I think you may be right there, MadDog. Looks exactly like the apron at a place beginning with Con, yes

Did you get to sit in it, Harry? I managed to and thoroughly enjoyed the upper gunner's goldfish bowl, I must say (moreso than the bomb aimer's position, actually). Splendid view, but you did feel rather exposed with all that protective metal plating around you (=none!). Not that the fuselage is of any protective value, either. No wonder bomb aimers sometimes flew with tin hats over their knackers as they lay down, for all the good that would do..
The upper gunner sat on what is little more than a thin leather strap hanging between two hooks for 12 hours at a time. Blimey!