Seems like factoring the location is the easiest solution. If energy were much cheaper in Scotland, some factories would move there, more people would move there as well and you would not need to transport so much energy across the country.
But I guess there are more things to consider than the energy in that decision.
>>pornel+k5
Get Octopus Agile [1] and you can query their REST API [2] to find the energy prices. Then you could control your fridge via a smart switch.