Aaaaaahhhh. Looks like the builder's going to start next week! So, no running water in the kitchen for five weeks, sitting room full of kitchen stuff, house full of builders, etc etc.
Now convinced he's a cowboy. No correspondence contains a VAT number, and his 'contract' seems rather sketchy. I'm going to try to get him to sign an FMB standard contract instead, and see what happens.
In total tizz re building notices, sizes and materials of doors and windows, appliances (Ikea or others), taps, blah blah. I need a lie down.