We haven't had a breakdown for a couple of years and then it was the PCB and something major but all got sorted. This time it was a leak that caused the boiler to shut down and this was diagnosed very quickly by the plumber as a nut that needed tightening - this was causing the water loss!! It was done in less a few minutes and the gentleman was courteous and attentive throughout wishing all jobs were like this. Having this cover does really give us peace of mind. Thank you.