I was wondering that (about Tyrone's house) too.
If there was no mortgage there would be more than £15k of equity in it, though. Even if they'd borrowed enough to improve it since Jack and Vera had it they can't have spent enough on it to wipe out the equity, can they?
It may be Tyrone's house legally, but I think that Fizz has a moral right to a share of it in the circumstances. Most couples would have some sort of arrangement set up, surely? Otherwise it would leave one partner with nothing after years of contributions of one sort or another. Anyway, I reckon that Phil will get his greedy hands on whatever Fizz ends up with, so the less Tyrone passes on the better.