Out of curiosity, where are you planning to go? I am planning to leave the UK too and would like to know some options. So far my plan is to end up somewhere in Eastern Europe. Cost of living is low enough that I can actually afford a property instead of burning piles of cash for a shitty London flat.
Western Australia. I lived there for a couple of years about 10 years ago as a skilled migrant, then came back to the UK. I was (really, really unexpectedly) lucky enough that when I applied to reinstate my long-expired visa they said "sure, you have a one-year window to get back over here".
Cost of living is pretty high, salaries are pretty OK (better than a lot of UK perm, not as good as UK fintech contracting AFAICT), houses are big if you live out of the city centres, the sun shines and the beaches go on forever :)