Electricity prices are high in the UK but there is a net benefit to it at least some ways, as always the devil is in the details, all the details.
It was annexed in the mid-19th century, they abused the Yorkshire Gold way before that.
If 2 European powers had a war over a territory that is now part of a third country we would still describe the war as being between the 2 original countries. Even if other territories that weren't part of those nations at the time now are.
But yes, on the other hand we are talking specifically about Texas so maybe you're right.
On the 3rd hand the chance to get superior with the colonies should never be passed up.
The UK relies heavily on tourism. Tourism is disrupted by global instability. Climate change and fossil-fuel-catalyzed wars cultivate global instability. And the UK doesn't have the land or people to compete on the global stage in manufacturing exports (not that they do bad work, just that the scale doesn't exactly pan out. Not unless people are really keen on telling the tale of two cities again).
Best policy is likely to focus on domestic affairs (how to keep the country stable and solvent as the population shifts towards more and more retirees) and maybe look into rejoining that massive free-trade sector right down the block that the country so short-sightedly left a short time ago, since it'd really open up the tourism and trade markets.