overnight tariff

Does anyone understand why you have to prove that you have an EV before they will give you an overnight tariff? Overnight tariffs are obviously there to balance load, and to shift consumption from daytime to nighttime. Anything they can get, rather than simply waste the electricity, is good for...

I have a 21 plate pre facelift MG5 Excite. Does anyone know whether it supports scheduled charging as I am contemplating looking for a cheap overnight tariff....... My dealer doesn't seem to know (there's a surprise!!!!) Thanks