Sorry guys your a bit out of date ....
https://en.wikipedia.org/wiki/Electrical_wiring_in_the_United_Kingdom ( I know wikipedia isn't the most reliable reference but my copy of part P is on the other computer)
"Since BS 7671:2008 normal domestic sockets are permitted, at distances greater than 3 m from the edge of the zones, providing the circuit is RCD protected. As the new regulations also require all general purpose sockets not for use by skilled or instructed persons to be RCD protected, this effectively permits normal wiring in the larger bathroom"
So yes standard sockets are allowed but you have to have quite a big bathroom