When the conservatory was built, the builders laid the cables inside the walls and into the house near a socket, to be connected up later by an electrician. When I asked him to wire it in, he said because I had an old fusebox he'd have to replace that with an RCD type first and because the wiring wasn't installed by him and hidden he couldn't sign it off. Hence the easy solution, at least for now was to replace the socket with an RCD type and connect the circuit up via a plug. Asking about part p because if it's not breaking any regs and it works safely, which it does, I'll just leave it. I'm Mr Anna Rack btw, a pseudonym for anorak which my wife tends to call me..