Are you saying FAANG in the UK will pay ~£250k? Glassdoor is showing way less, with senior dev around £100k [1]
1 - https://www.glassdoor.co.uk/Salary/Microsoft-London-Salaries...
1 - https://www.glassdoor.co.uk/Salary/Microsoft-London-Salaries...
Check levels.fyi, it is much closer to the truth. 250k GBP TC in London is possible at FAANG L6/E6 (or L5/E5 with some luck with stock appreciation). HFTs are also able to pay that.