December's UK electricity production graph makes interesting reading:
- Peak demand was 50.6 GW, reflecting the gradual decline in peak demand over the last ten years or so
- Wind (green) made a useful albeit sporadic contribution
- Solar PV (yellow) was negligible, and nonexistent at peak times.
- There were several high-peak-demand days with almost no contribution from wind
- Gas (light brown) is now taking virtually all of the strain of meeting fluctuating demand as coal is phased out
- Average demand at 36.5 GW is 14GW below peak demand giving an opportunity cost of not having domestic demand response of £110 billion at present non-carbon firm supply capacity cost (i.e. nuclear). That's £70 million a week that could go towards the NHS for 30 years.