Sad experience, we had a new Worcester Bosch boiler fitted by Northern Gas 18 months ago after three failed appointments the Guys turned up to do the installation, the poor guys were given a day to do the job that was quoted as a two day job for two engineers they worked hard and finally left our property at 10pm after providing them a meal as they had 50mile journey for their overnight stay, we had problems with air in our system soon afterwards engineers revisited and made some adjustments, 18months later the boiler failed and had to be replaced due to heavy corrosion and leaking pipes within the boiler casing, this was rectified very well directly by Worcester Bosch who honoured their Warranty and sent 3 engineers and a foreman to over see the job 10 out of 10 unfortunatly the cause of the failure is the way the boiler was plumbed, we are still waiting for a visit, four phone calls in the last 10days with no reply, finally got an appointment for tomorrow 13th March was cancelled at 7.30pm as doubled booked, strange never heard this excuse before!! I am looking forward to giving a better review as I have never written a bad one before, but somebody at Northern Gas needs to Listen please.