Kris was very courteous and knowledgeable. Though he couldn't make it for the original appointment due to rushhour traffic, he came the very next day at a pre agreed time even though it was a Saturday and identified the fault quickly. It took a few days to get the parts and change it but there was another issue after he left and Kris offered to come again very late in the night to fix it straightway.
The boiler was old and he recommended getting a new one instead of conituining repairs which was a fair point . His quote was reasonable, but not the cheapest. The only one thing that I can think of he could have done better was to better inform me of the options (repair vs new boiler) and the possibility that repairs might not be enough so that I didnt waste money on the repair he did, probably nobody could have guessed that. He also texted me back a few days later to check if the boiler is working.
Overall I'm happy with the work he did and his recommendations.