Firstly, Dell arrived on the day he said he would at the time he said he would, which is a real plus. Del replaced a failed cartridge in a bathroom tap and serviced my boiler. I tried doing the tap my self, but wasn't sure how much force I could use, or where, so left it to Del who deftly pulled the tap off and swapped it out. Del then serviced the boiler, explaining a valve wasn't sealing correctly, removing it to show me exactly where it was going wrong, and how he would fix it, then fixing it a reinstalling it. Del cleaned up the heat exchanger, put everything back together and ran a series of diagnostics checks to make sure it was working correctly. Start to finish was about 45 mins. Very happy with his on time arrival, professional approach, pricing and quality of work. I've already rebooked Del to carry out my mother's boiler service and highly recommend him to anyone needing a boiler service - which we all do or your home insurance is invalid (check the small print and don't get caught out).