I get the impression that BG just want me to buy a new boiler from them. I am always getting letters saying the spares are no longer available etc. The engineer was also very pushy trying to sell us other goods.
I do wonder if BG engineers get commission for sales following visits?
I have a very low opinion of BG as a company - although some of their engineers are very good. The price difference for a like-for-like boiler replacement by BG and a local independent is quite often staggering. (4.5k for a supply and fit combi from BG, 1.8k from an independent for one job I priced a couple of years ago. Made me spill me tea.)