Knuckles is confusing 'production' with 'geography.'
The US is cheap because they have a surplus they cannot export fast enough through their few LNG terminals. That trapped supply keeps their home price low.
The UK is an island on a global auction block.
US prices haven't gone up as much because unlike the stupid "green" fanatics in Europe, they actually MINE for coal, oil, and gas, and allow the various products to be produced for it, as opposed to Europeans who chose to shut it all down just to "go green."