Pet @ www.gymratz.co.uk ;¬) wrote:

But it would be worth checking to see whether the lighting circuit is
RCD protected would it not?

Why? A towel rail would only require RCD protection if installed in Zone
1 (i.e. directly over the bath). In Zone 2 no RCD is required, but the
appliance must meet IPX4. In Zone 3 or beyond there are no special
requirements at all. The control switch/isolator must be in Zone 3 or
beyond, in any case.

Don't forget the supplementary bonding.

(Note for future Google archive readers: this article will be invalid
after 01/06/2008, the expected date by which the 17th Edition of the
wiring regs will be in force.)

--
Andy