I'd forgotten about this, what was it Derrick??
So had I, now to give everyone an update,
Removed the fllor tiles, removed the ply (he had glued that to the floor boards)
Removed hand basin, removed WC, exposed all the pipe work, there was the culprit, a dripping elbow, the floor underneath was full of brick rubble/plaster, it had soaked up all the water, it was like mud, but as all that had soaked up the water, it never showed on the ceiling downstairs
The bloke didnt want me to remove the floor or tiles in the bathroom (quite happy to remove the bath panel and change the pipe to the bath though) in the endd, he had no choice
After all that, he argued about the price I gave him and took 6 weeks and too many visits to get paid off
I took out 3 buckets of rubbish, it wasnt a massive leak, just enough to move the meter, though
Replaced the fitting, job done, no leak