Excellent work done by Northern Gas. The engineers came down to our property on time. He made his identification and qualifications clear to me, then proceeded to talk me through his intentions of the installation of our new boiler. He proceeded to do this job with the upmost profession and this included securing our external flue pipe. They finished installation on time. Full instructions were given to myself regarding the new thermostat and boiler. After the job was completed, the engineer made sure that the area was cleaned around them.I could not speak more highly of him. I highly recommend Northern Gas. Thank you.