My kitchen ceiling has collapsed due to a leak, we think it’s a leak in the pipe from the bathroom above. It’s a mess, we can get someone out tomorrow to sort it out but my bf cannot get the day off work, i could ask my boss if I can finish a few hours early to let the builder person in, do you think this is a reasonable of me to ask her or not?

Yes. If your boss makes a problem of you taking care of your house they would be an ass

Absolutely.

I’d say so. They ought not to take one of your holidays either because you didn’t choose to have a leak and destroy your home