WOW - 1 down, 25+ to go

So at last they have found the leak. Another hole in the bedroom wall was needed but a loose T-junction on the hot water pipe seems to have been the culprit. It was tightened last week and today a worker from the sanitation company can and blocked up all the holes ready for the tiler to come and put tiles on. He was very careful about the mess he made and did a very good job.