That's just Ernest of E. Brumfitt and Son locking up for the night. Son left early for the R.E.M. gig advertised on the poster by the workshop and left him to it 😂
(Going by the poster, that would be the 1998 Up tour, at which time my dad and grandpa did work as picture framers in a workshop a bit like that, and I did help out on a Saturday job from time to time, and did go to that R.E.M. tour at the Stirling Castle date. Love how much personal history you can work into a model railway!)