One in five investment professionals based in the UK expect to leave in the next year due to increased tax rates, according to figures from CFA UK, providing one of the most concrete examples yet of London's place as a financial centre being damaged by the proposed 50% tax-rate for top earners.

Investment association CFA UK found that of 791 respondents to a survey on member's plans, 20% said that they expected to leave the UK in the next year.