[twic]

It still seems low for that amount of experience. In a non-finance company in London, someone good with 15 years experience should be on >= 100k. I know people with less experience working at such a company making 140k; my impression is that this is on the high side for that context, but it definitely exists.

Maybe it's less outside the south-east. But OP works remote, so why not work remotely for a company that pays decent money? I know a guy who lives in some godforsaken fishing village in Scotland and has a remote London job.