On Sun, 16 Dec 2012 15:48:20 +0000, John Rumm
wrote:
Out of interest, how many circuits are being protected by the single RCD?

There's a total of five circuits, all on B32 MCBs. They are three
rings for sockets, one unused radial for the cooker (changed from elec
to gas hob, so not needed now), and one radial for a shower steam
unit.

The things not on the RCD are the lights (thank goodness), smoke
detectors, and a radial for the immersion heater.