With the recent freezing weather the condenser pipe had frozen! We have never experienced this problem before and could not work out why our boiler/heating would not work. We phone James and over the phone he gave us advice on what the problem possible was and what to do. The advice he gave us worked and our boiler/heating came on but during the evening it all went off again and we were unable to re-start. Therefore, on the Monday morning we phoned and left a message for someone to call - by the afternoon James had responded to our message and had fixed our boiler!