What are those 'extremely high salaries in tech' you speak of, outside of a select few Canary Wharf positions? UK salaries in tech are abysmal from what I see - and just last year I heard a UK 'entrepreneur' brag about how cheap engineers are in the UK at a software business conference. Also keeping in mind CoL - who wants to take a London job when it means 2 hour commutes one way in order to have some disposable income left?