I am not sure, I also have a storage heater on the same circuit. Probably I need to speak to the power company if I want to connect a power bank of some sorts, like charging a car.
The tariff is called Economy9 for reference. It's not widespread outside London.
Is it not? I know at least a few people who use Economy9 in Newcastle. And yes, their storage heaters are hardwired to this secondary circuit.
We're on economy9 in Warwick. As I understand it, the landlord added it fairly recently (within the past decade).
I had Economy 7 when i was a student in Oxford twenty years ago. How things have come on - just imagine, by 2040 we may be up to Economy 11!