Will James wrote:

I am thinking of getting one of the standard three way weather proof
switchs to control my lights/pump/water feature etc. However, on the
instructions for my Hozelock pump it states a residual current device
(RCD) must be used. I can't see any mention of a RCD being included on any
of these switches, so do I need a separate RCD and if so where would I
attach it, the external cable is currently linked to a fused switch inside
the house.

The way I did it when wiring up my pond was to place a GFI receptacle on the
(inside) wall of the house where the circuit to the pond left the house.
The electrical inspector was happy with that.
--
derek