Hello. When I had my Consumer Unit replaced, one circuit was found to only serve a blanked off socket, possibly for use by a stair lift that was never installed. The electrician connected it to a 16A MCB and marked it on the EIC as unknown. I now need a socket about 2m away from the CU. If I splice it into the 'unknown' circuit as a fused spur (not touching the wiring in the CU), I presume it is not part P notifiable? But what if I don't reconnect the old circuit so I just have the spur - has it now become a new circuit? What if I don't bother with the FCU and just use a junction box, as the MCB now only has to protect a 2m surface mount cable? I don't mind putting in an FCU, but I already have a 30A junction box which will save me a trip to the shops. The reason for using this circuit is that it is surface mounted for 50cm before it goes thru the wall, all other circuits go directly out the back of the CU. Thanks.