Certainly at one time (and I suspect it is still the
case, but I
haven't checked) the only socket outlet that could be installed in a
bathroom ('room containing a fixed bath or shower') was a
transformer-isolated shaver socket.
Those existed west of the Pond too, back in the day. They might even
still be code, for all I know, but I can't recall the last time I
actually saw one; such sockets seem to be all GFI these days.
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