Avoid
Avoid. When we used them, they later turned out to have used a dangerous, makeshift solution to a plumbing problem (capping the vent on a hot water cylinder to get round a difficulty elsewhere). When it went wrong, they charged a callout fee for inspecting their own work, admitted they'd got it wrong, but then refused to put it right.
It's true that putting it right safely would have been a big job: that's why used a dangerous, makeshift solution in the first place. But it would have been better to be honest about that upfront. Charging us for coming round to verify that they'd messed up was pretty punchy too.

