My old man has cover with BG(Homeplan 400 I think its called)(I live at his place as he only comes home about 2 weeks a year). We had a leak on 10mm microbore-15mm rad valve solder ring fitting, they came out put new valve on, cut pipe and put 10mm compression straight coupler inline. When I got home had a look and the microbore looked like a helter skelter, where they had twisted the pipe. The room stat didnt work, the hot water ran hot/cold/hot(valliant turbomax) they replaced the diverter valve.
I spoke to them after finding out his cover included plumbing, heating, wiring and drains.
They've since come back and replaced room stat(after not bothering until I told them that it must be covered), DHW heat exchanger(they said it wasn't covered). I said to them what is he paying for with a combi as per access to pipes, sludge, and scale exemption!
They didn't want to repair the twisted pipe as they said we'd have to break out
wall/floor(concrete) and the rad was heating up ok.They're now coming back to fix but we have to make good (I said it was their cock up).
You may ask why haven't I repaired this(well its been covered for years before I got into plumbing, but when it's fixed my old mans cancelling the policy!!!)
By the way they quoted ÂŁ255 to fit a Magnaclean(I bought one from city plumbing ÂŁ80.