PSA: The National Grid (in the UK) cannot distinguish between sources of electricity. One cannot be "switched" from one source to another. The idea that one can change one's electricity supplier and then get "green" electricity is about economics and marketing, it has nothing whatsoever to do with the electrons that enter and exit the home through one's distribution box. It's a fantasy.

When I see marketroids talking about "green" electricity I feel sad for them and the people who believe them.