I've been having some success with an IR stripper on that kind of paintwork. Either that or a sharp chisel and hammer. Toupret Murex is quite decent for filling cracks and refacing rough stuff.
It is a nasty job but that's a relatively small area and it's not as bad as some I've had to do.
Out of interest, what would you pain that with, once repaired?
A lot of folks on our street have terrible peeling paintwork around this area, and on the cill below, and friends of ours had theirs repainted that has since blown in the space of six months.
Cheers for the reply!
It’s going to be a stinker of a job.