Fair enough. Do I therefore take it that the 'offending' cable, which was supplying the two kitchen sockets (from the single socket's neon terminals!) goes out of the back of the single socket box and straight through the wall? (as I said, there are not enough visible cables to explain it).yes, the single switched socket is part of a ring.
However, there is still a theoretical problem. regulation wise. Even given that the switched single socket is part of a ring, it is supplying the (unswitched) single socket before the FCU - which is not strictly compliant with the regs, since it means that an unfused spur is supplying two things (the socket and the FCU), whereas it is only allowed to supply one. If the unswitched socket and FCU were swapped, it would then be reg-compliant.
Kind Regards, John
yes, the wires went straight out the back through the wall. also the unswitched socket has been removed and the FCU wired in correctly.