The US taxing you anywhere you live is only possible because of the premium people place on US citizenship. Even so, some people elect to give it up when they emigrate somewhere else.
You need to have a citizenship. I’m willing to bet that living in another country with a strong passport for long enough to renounce your British one, just so you can move to a tax haven, while losing your right to live in the UK, is a bridge too far for most Brits
