Interesting. How is the market in London for frontend devs, specifically ones working in the React stack (plus some GraphQL)?

I was in London last year and got the impression that it's a pretty lackluster market - high cost of living, average earning potential. I did some back of the napkin math and realized it only made sense if I worked remotely and occasionally visited London (once a month, twice a month maybe?).

What do you think is the going rate in London for short-term (up to 3 months max, preferable 1-1.5 month contracts) freelancers that don't live there but can occasionally visit for meetings and such?