Craig,
you are not mounting the socket into the skirting
you are mounting a flush metal box flush with the surface of the skirting and then fiiting the socket to this, this is perfectly acceptable
Many old houses will still have wooden made fuse boards, not great but still working
you do get sockets on the market that can be virtually invisible, you paper/paint over most of the socket and cover with a clear plastic front, these are also available for switches
you are not mounting the socket into the skirting
you are mounting a flush metal box flush with the surface of the skirting and then fiiting the socket to this, this is perfectly acceptable
Many old houses will still have wooden made fuse boards, not great but still working
you do get sockets on the market that can be virtually invisible, you paper/paint over most of the socket and cover with a clear plastic front, these are also available for switches