I have some particular skills, UK firms simply can't afford workers like myself and thus don't really do business in the sector.

A simple payscale.com comparison (not vouching for the data, it's just the first hit on google)

Average Software Engineer Salary

UK: £34,981 ($44908 USD) [0]

US: $83,483 [1]

The median salary is roughly double, if you are an outlier that number grows to about 4 fold.

[0]https://www.payscale.com/research/UK/Job=Software_Engineer/S... [1]https://www.payscale.com/research/US/Job=Software_Engineer/S...