On Tue, 19 Nov 2019 21:50:57 +0000 (GMT+00:00), Jimk wrote:

Before she sets about replacing a couple of knackered storage
heaters

Forgot to pick up on this earlier.

Depending on her circumstances she might be able to get that done for
free. There is (hopefully not was) a scheme about that replaced old
storeage heaters with modern high heat rention ones. One snag is that
such heaters require both an E7 switched supply and an unswitched one
of a kW or two.

--
Cheers
Dave.