Britain's prices shot up with everyone else in Europe's when Putin reduced the gas supply, but Britain is more reliant on gas than many other countries so the price hasn't come back down.

Sjælland's overnight price last night dropped to about 0.75kr, but in Britain it was 2.10kr! The peak prices today were similar, 2.70kr and 2.80kr, but Britain had that for most of the day, and Sjælland just 4 hours.

Britain also has buildings with worse insulation, fewer people living in apartments, and much less use of district heating.

https://andelenergi.dk/sel/timeenergi/

https://agileprices.co.uk/

https://app.electricitymaps.com/zone/GB (40% gas right now for GB vs 4% for East Denmark and 2% for West.).