If possible I would give British Gas a "no star rating". I had a Combi boiler installed in January 2015. During the first year I called out an engineer twice as the water was not remaining hot when running a bath. This problem was never solved. The first service (understood to be free) in Feb 2016, again, did not solve the bath water problem. I called out an engineer again and once more the problem was not fixed. I got in touch with Bosch, the manufacturer, who sent out an engineer and the fault was rectified. He also told me there was a leak on a radiator which was causing a pressure drop. This radiator was replaced and the system now works fine. I was also informed by British Gas, on the first service, that "a not to current standards" situation was on my appliance but that it was safe. This would involve an upgrade payment which I would not pay. The service was carried out in March 2017. In2018 the service cost increased by 15.5%. When I complained about this they could not justify the large increase to me. Based on the first service being free and my direct debit starting straight afterwards, I assumed that my 2018 service (which has not taken place) was paid for only to be told by British Gas that the first service was when the boiler was installed!!! Needless to say I have cancelled my service agreement and no longer wish to be associated with this shambolic company. I still believe money is owed me and will pursue this.