So it turns out the "small leak"'from the towel rail in a newly installed bathroom wasn't the only leak.
The fitters have finally returned today to investigate as I suggested that the water running down the kitchen walls and the sound of water sloshing above the kitchen ceiling boards, were perhaps not indicative of a small leak that had been fixed.
Anyway, it seems there was an additional issue with the flexible water pipes going to the bath.
The water must have been leaking for about 2 weeks (I was repeatedly told it was just residual water from the previous supposed leak) so I am now wondering what damage has been done to the new floor (fibre) boards and the ply laid on top? The tiles have all shifted and grouting has cracked along with a disconcerting squelching noise when stepping on some tiles.
The fitters claim that it'll all dry out and the boards will be fine as the water rolls off them and down the joints etc.
Does this sound likely? Will the ply really settle back down after moving about? I'm really not ecstatic about the idea of risking keeping the boards when they've had a soaking and we've spent ££££'s on the bathroom!
Advice of STW experts? The old bathroom was ripped out as the floor was rotten for flips sake (new house).