Britain's general election campaign, which ended yesterday night, has turned the spotlight on the closed world of the ultra-rich.

The main opposition Labour party has repeatedly attacked tax avoidance and evasion, and promised to renationalise key industries, including mail delivery, energy and the railways.

Billionaire mobile phone magnate John Caudwell on Monday warned Labour tax hikes for the top five percent of earners and business tax would stifle investment.

But the ruling Conservatives, who are promising across-the-board tax cuts, have been more accommodating, proposing few changes that would alter Britain's status as an attractive destination for the elite.