Bit of an update, ok?
I turned up 10 minutes early (roll eyes!), rang bell and saw a bird in the front room hurridly tidying things up. Ok, I think, I gets stuff ready. No reply at door, so press it hard again (I'm not going to messed around), door opens, but it's not sloppy son who answers but the bird, looking like she just got up and holding a banana in her hand, all sleepy eyed blah blah.
Smade a phone call to the owner and after some faffing over what door opens and what door doesn't, I got access to her rear. (Funny, huh?). Did the job, fnarr fnarr, and got out, left the effing great bill for eyeing a bit of 20 y/0 tit and ass and skiddaddled.
Gone, £24 the richer if the momma pays.
Will anyone let me in next time, huh? If not, if on-going access problems...
Still, a reasonably nice 20 minutes with a bit of fantasy.