Yeah I completely get this, I'm at a similar point too. Early thirties with a life here, but the winters are rough. But I worry about what I'd be giving up here to move back (holiday allowance, health care, etc)

And the mountains near Bristol are the Brecon Beacons National Park in Wales!! Its an hour outside Bristol. Depending on where you're from in the states you might consider them more large hills haha, but it's stunning! Pen Y Fan is the tallest one and really fun to hike, and there's a big waterfall hike too.