Not sure it’s really a good idea to use electricity for heating, unless you are going to use a ground- or air-source heat pump, which are 3 or 4 times more efficient than standard “heating element” type heaters or boilers.
The problem is, around 50% of the UK grid is gas generation and when using gas to make electricity, around 50% of the primary energy goes straight up the power station chimney. It’s far better to use that gas directly for heating.
Some say that the electricity from the south of Scotland is low-carbon (~130gm/kWh) and high in renewables and therefore electric heating might be slightly lower carbon than a modern condensing gas boiler. But even if you are using that green electricity locally, CO2 emissions are a global problem, and that electricity is still displacing green electricity from the UK grid.
The UK grid is more or less self-contained and runs at around 200 - 400gm/kWh, depending on wind conditions.
The snapshot below was taken just now (a very windy Sunday 24th March 2019 at 8:30pm) and is about the most favourable I've ever seen it in terms of being low-carbon.
Untitled by Ed, on Flickr
I'll take another snapshot later, during the day, when it less windy, to compare (but I would expect it then to be around 50 - 60% gas generation and 300 - 350 gmCO2/kWh)
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