Asked a plumber I've used before to stop by this evening to fit a bath mixer tap, basin and flush. He said he'd finished and we realised that both sets of taps were coming out of the wrong one (they have hot/cold written on the taps). He looked a bit crestfallen then said he'd swap them over. He's now gone and the basin taps are the right way around but the bath mixer tap has steaming hot water coming out of the cold and cold out of the hot. The flush also isn't working!
I'm very stressed and he is saying he'll fix the toilet but says the hot/cold mix up isn't his fault as they were originally plumbed that way. I would have told him to leave it and returned the taps if he'd bloody told me!