The taps below it are both fine, but the shower seems to have massive issues with producing any hot water now! FFS
Anyway, while I am off to the gym to use their showering facilities (at least i'm now forced to attend

I can't work out how thew taps are fine and the shower isn't though, unless there's a blockage somewhere?
Any plumbing geniuses out there that might care to give me a few pointers?