Yes, we had 4 leaks ourselves in the past - so I was very worried when the alarm went off. The plumber who conformed (in his written report) that there was no leak was not from GLL (I’m part buy, part rent = Triathlon). Actually, there were 2 different plumbers from 2 different companies. (One of them was from Homeserve; I’m testing their plumbing insurance now for £1 per month for one year, and I can definitely recommend it. Very reliable, very quick, very efficient - so far.) Anyway, the alarm goes off every now and then (funnily enough it’s often when I use the oven! ) and then stops after an hour or so, only to go off again some days later. So clearly a malfunction. I was just wondering how to deal with it - who can service the thing, etc.