The UK’s average energy price is high, but it’s also very variable as when it’s cloudy and calm 20% of demand needs to be imported from France/Norway so wholesale energy is very expensive, but when it’s sunny and windy wholesale energy is free or even at negative cost and 20% of generation gets exported to France/Norway, where their energy is more expensive

If you have the option to run datacentres at minimal or even negative energy cost maybe 20% of the time, then shift load elsewhere the rest of the time, then that may be a reasonable proposition