Based on Nicks Testimonials I decided to give them a try. It was very refreshing to talk to a professional who new what he was talking about. Not only did he fix the thermostat but I found out that the immersion tank I thought was causing the problem above the bathroom was in fact an old one that had been disconnected 3 years ago and no longer in use, the tank that was causing the problem was on the roof! What a bonus not only a new thermostat but also now gained an extra four square metres of storage space….once I get rid of the old tank! Great, Professional Service good value. Giving me peace of mind knowing there is a good maintenance team out there! Will definitely use Nicks again and recommend!