An excellent job by Daniel. he answered my request within an hour and came round to my house just half an hour later - and it was a Bank Holiday!
It took time to diagnose the problem (a faulty gas valve in my Vokera boiler), but Dan was able to return the following morning and fit the new part. To save me money, he sourced the cheapest replacement part - and showed me his receipt to prove it! Once installed, he carefully adjusted the flow rates as per the manual and carried out a full safety check.
I was happy with Dan, not only due to his friendliness, obvious honesty and attention to detail, but also because he was fully qualified and gave me great confidence in the repair work he had undertaken.
His charges were very reasonable and he kept me informed all along as to the costs to be incurred once the problem was identified.
I would happily recommend him to anyone!