Sure, it's "temporary" in the sense that if suddenly gas was cheap the price goes down because it is in fact set by the fuel for gas turbines. I don't expect that to happen for a long time, even though in theory it could happen this afternoon. Traders are already assuming Summer 2022 gas prices will be very high.
Without that it is only possible for prices to fall after we build a lot more wind turbines (projects out to 2025 are only a few Gigawatts extra, not enough) and storage (10GWh more storage in the UK would trim the top peak prices, but you'd need an order of magnitude more to make a difference on midday price trends) and the more effective that storage is, the less economic sense it makes without subsidy. If I buy electricity for £30 per MWh and sell it for £350 per MWh that'll quickly pay off my investment in storage, but if I buy it for £30 per MWh and sell it for £40 per MWh because we've stabilised prices, that's a long time to pay back my investment in storage.
Basing your figure on the consumer cost means in the current environment it just tells you what the price cap is, and that cap is set by government. It rises in April this year (to 28p per kWh) and is expected to rise again later this year, and then perhaps again next year. That cap doesn't reflect the actual cost of the electricity, the difference is why dozens (yes, dozens) of consumer electricity companies have gone bankrupt in the UK in recent months.
Significantly greater in the period covered by that document (2020 under Pandemic lockdown) but probably much closer to equal now with people back at work. But sure, there will certainly be less usage in summer than now.
Prices though remain high and are likely to remain high for the foreseeable. Just as natural gas prices effectively set the electricity price even when a minority of electricity comes from gas global LNG prices effectively set the price of natural gas even in a country like the UK that has considerable local resources.
Today the wind picked back up and prices stayed slightly under £200 per MWh, but remember that's not actually low, it just seems low compared to recent extraordinary heights. In February 2012 £49.10 was the average price of day ahead baseload electricity by February 2015 it is £42.86, and by February 2021 it was £32.04. Despite the windy weather this month it may be north of £200 for February 2022.
Without that it is only possible for prices to fall after we build a lot more wind turbines (projects out to 2025 are only a few Gigawatts extra, not enough) and storage (10GWh more storage in the UK would trim the top peak prices, but you'd need an order of magnitude more to make a difference on midday price trends) and the more effective that storage is, the less economic sense it makes without subsidy. If I buy electricity for £30 per MWh and sell it for £350 per MWh that'll quickly pay off my investment in storage, but if I buy it for £30 per MWh and sell it for £40 per MWh because we've stabilised prices, that's a long time to pay back my investment in storage.
Basing your figure on the consumer cost means in the current environment it just tells you what the price cap is, and that cap is set by government. It rises in April this year (to 28p per kWh) and is expected to rise again later this year, and then perhaps again next year. That cap doesn't reflect the actual cost of the electricity, the difference is why dozens (yes, dozens) of consumer electricity companies have gone bankrupt in the UK in recent months.