That figure must be for outside London, no? Since there aren't too many UK salaries here I'll add mine for London, all in GBP:
- 2006-2009 45-60k Employee, US investment bank, Analyst
- 2010-2012 300/day Freelance, full stack web dev
- 2013-2017 105k Employee, tech lead at a startup
- 2018-2019 700/day Contractor, Senior Python Developer