Wait untill the middle and far estern banks move out of London and that 10% of GDP from the city dries up, then we will see how bad things can get. Its coming, don't think manufacturing is the only thing that can be moved off shore.
The government just don't seem interested in protecting the future of the UK. May be thats the problem, "too many jock's spoil the broth".( or should i say get their own back!)