The guy was recommended to me by a friend, and when he came to quote, he spent a half hour doing a visual inspection. Dunno about LABC, but he did say he'd give me a certificate. He said the board change would be straightforward, without the need to extend any of the cables. The flat is in one of the outer London boroughs. Is £400 to supply and fit a 10 way board excessive then? I must admit I did not get any further quotes.