Brendan Barber, leader of the TUC, has launched a campaign at its annual conference in Brighton, to abolish non-domicile laws and tax breaks.

It came as he called on the government to scrap the tax laws, which the union claims the laws allow city tycoons to pay lower rates of tax than office cleaners.

The TUC based its campaign on research carried out by accountant Richard Murphy of Tax Research to call on the government to scrap its non-domicile tax laws which favour the super-rich.

According to Murphy, if 20% of non-domiciled claimants were to leave Britain if the loophole was scrapped, the UK would still be better off by £4.3bn.

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