I'm going to look at a job on Monday regarding connecting up a whirlpool bath. The client has told me over the phone that a supply is available in the airing cupboard which is next to the bathroom. Depending on what supply is in the airing cupboard and I'm guessing a circuit to an immersion heater, I will be looking at spurring off a ring and using a rcd spur connection unit if there is no rcd protection on the board.