It’s really not.
The North Scotland grid is currently 5gCO2/kwh and 98.6% wind and 1.4% gas.
The East where I live is 183gCO2/kWh and 20% solar, 7% wind, 16% imports, 23% nuclear, 29% gas and 3% biomas*.
Which do you think is more expensive to supply? Spoiler, it’s the East of England and it’s considerably more.
*contains rounding errors
You're not talking about the same thing as me.
Yes
production of electricity in Scotland is cheaper and lower carbon.
But if you live in Scotland you don't just get Scottish electricity. They may account for it in that way, but from a physics perspective it's not true. Electricity doesn't flow through wires. We all harness the electric field energy in the grid created by the whole system.
If you want to break the link between England and Scotland (for example) by completely separating/isolating the actual grids, then you could say Scotland gets Scottish produced electricity.
Edit - with a bit of help from Chatgpt:
"In an AC synchronous grid:
Every connected generator — whether it’s in Scotland, England, Wales, or Norway via the North Sea Link — contributes to the entire system’s electromagnetic field.
All loads (homes, factories, data centers) are drawing from this shared electromagnetic state.
So no one load can be said to be using electricity from a specific generator, because every generator is supporting the same voltage waveform across the entire network."
"What actually determines how much “share” a generator provides?
Generator setpoints & dispatch: National Grid ESO and other system operators dispatch generators based on cost, emissions, location, and availability.
Impedance and phase angles: Power flows according to the network’s impedance and the relative phase angles of generators.
System-wide balancing: If Scotland is exporting more power than it uses, then Scottish generators are contributing more to the overall waveform — but that doesn’t mean you're only using their power."
And to conclude:
"Once electricity enters the transmission network, it becomes part of a single, synchronous, shared electromagnetic system — and individual consumers can't trace their electricity to specific generators or regions.
So any regional pricing scheme that claims to reflect “local generation” is not based on physics, but on economic or policy mechanisms — like managing grid constraints or incentivizing local investment. If that's the justification, fine — but it shouldn't be misrepresented as "you're using your local power so you should pay X"."