T
trev
I think you need to go round there and find out exactly what's what mate, take a look at any certs and get the cover off the CU just for a look. Once you find out the above come back and get some advice, it's a bit confusing as to what's happening here from your posts so let's have something concrete to go on first.
Once you get this you could always ring the installers and ask in a friendly manner at first (as if you know nowt, that's my favourite trick) then if and when you get flim flam off them you can then hit em with regs and they're on the back foot already.
Once you get this you could always ring the installers and ask in a friendly manner at first (as if you know nowt, that's my favourite trick) then if and when you get flim flam off them you can then hit em with regs and they're on the back foot already.