Tony came round in the afternoon to practice our acoustic set for the street party. A while back we got a letter from Thames Water saying  since we had our water meter fitted they suspected we had a leak and were losing 15 litres of water an hour and it had to be fixed. On Wednesday some chaps came from Thames Water, I thought to identify where the leaks were but it was only whether the leaks were nside the building or not. They said they were inside and we were losing 150 litres an hour  We had iidentified 2 small leaks in the downnsairs loo. One in the loo itself and a leaking tap but that would not account for that much leakage so called out a leak detection expert. He did pressure tests on the rising main circuit and between the meter and rising main and could not identify a leak except for those mentioned. It then occurred to me I could do a test myself as the meter is readily accessible. This showed we had used 9 litres in 12 mjns but M had flushed the loo which is about 6 so 3, which is 15 litres an hour. So came to the conclusion we should just fix the leaks we know about. This was later confirmed by a further test where the water to the downstairs loo was switched off and the meter showed no water was used.