Southampton.
Tbh the whole exterior needs sorting too, soffits, guttering, its on its original 100 year old roof to (which touch wood) is still fine
I have good and bad news:
There is steelwork, one RSJ picking up the wall that was removed, and it looks like they bolted 2 small steels to pick up the chimney leafs the one side I have access to is 40cm long. but, its not supported at one end, and has dropped about 5mm – that would explain the cracking in the chimney above it. There is no evidence of any support or fixing on the end of the stubby bit so I assume its as designed. The outer leaf is on a wooden joist. I would have expected the steel to be fixed to joist or something else at the end not just left even if its short
No evidence the movement is recent, and given the evidence was the plaster had been repaired several times above the chimney I reckon it was settlement relatively soon after the lower stack was removed.
Needs to come out soon though.
Should have just painted over the wall paper
*looks like the block work to the side of the chimney was built to hide the flue as it comes from the corner of the room across to the stack. why its built out of solid brick I don’t know if it was just built to hide the flue bend