I'm not using the bath in this room, just the toilet (which i don't want to freeze)
Up above is a plastic water cistern which I don't want to freeze.

Hence the only heating is the frost heater which is set to turn on at around 3 degrees Celsius.

Do I have to run another cable in there for the frost heater and fan, or is it OK to have a 6 amp or 10 amp lighting circuit of 1.5mm cable feeding light, fan and heater?

I haven't decided which way to do it.

[george]