I looked in Trusted Traders for one nearby, with a good number of reviews and a high score. Phoenix Heating Ltd., stood out with over 50 five star reviews. I was impressed with Kieran's speedy response and what he had to say at the initial visit. He appreciated that, as an older person, I would need the heat to be restored quickly and that the age of my 50 year old CH system also needed to be respected. He provided a quote by email quickly, with two boiler options, and various recommended additions, such as a filter, renewal of pump and valves, Nest controls, all of which were separately priced and he said were optional. I had several 'weeping' radiator valves, so he gave me a guide price per valve that would vary according to which type needed replacement. Kieran was able to fix an installation date within 12 days of me accepting the quote. Kieran and Tom arrived early on the agreed day and assured me that the heat would be back on that day. They worked well as a team, demonstrating their experience of boiler replacements. In my case the boiler had to be re-positioned, I agreed to all the optional items and they corrected the boiler by-pass . They worked until 7.30 pm to meet the promise to have the heat back on. They returned, as agreed, three days later to refill the system after flushing, install controls, correct header tank overflow and complete the job. Everything was done neatly, with complete respect for working in my home. Highly recommended.