In uk.d-i-y, N. Thornton wrote:

I can't suggest you do it since youre putting a drier in a wet
bathroom. Others will doubtles comment more on this.

Indeed, Christian's already done a fine job of laying out the consequences
of the very latest IEE Regs revision about Zones 0,1,2,3 in bathrooms, which
relax the older "nothing but shaver-sockets and string-operated switches
in British bathrooms, no way, no how" to rather more rational "nothing you
can foreseeably put fingers or other sticky-out or dangly bits into when
you're dripping wet in the bath", at the expense of some complications which
are all about defining what's considered a likely reach distance from a
bath/shower.

So, if the OP is happy to comply with all the details Christian summarised,
they'll be on a win. If they want to consult the "why", they need to scour
the Net for a picture of the new bathroom Zones and figure it all out.

HTH, Stefek