bpec have changed their paperwork, originally MET 1 was for domestic meters and MET 2 was for commercial, last year they changed he name of the domestic paper to MET 2, but it was still only for the domestic guys, confusing or what? once completed we tick the MET1 box on the assessors paperwork so that the guy gets a domestic ticket, nothing like making things simple, so to the OP i suggest you check with the certification body you intend to use and make sure they know you weant the domestic ticket, once you have it you will be allowed to alter existing meters fitted internally as part of a kitchen refit etc, but you still need to be registered with the supplier or transporter as a certified person (cant remember the exact phrase, its mentioned in BS6400 for meters)