Ed Miliband has described Britain's non-domiciled tax status as a "failure of governments of all parties."
Announcing Labour's pledge to scrap the controversial status if the party comes to power this morning, Mr Miliband likened the UK to an "offshore tax haven" for allowing some of its wealthiest individuals to escape tax on earnings they make abroad.
Dragons' Den star and businessman Duncan Bannatyne has lent his support to Labour's plans to scrap the non-dom status.
Despite being one of 30 business leaders to sign a letter backing the Conservatives in The Telegraph last week, the entrepreneur has posted a series of tweets showing his support for the move:
He also told Business Matters magazine that those with non-dom status had an "unfair advantage" in business.
There are about 114,000 non-doms in Britain today and whether they decide to leave seems to depend on how much any changes will cost them.
The Conservatives strategy on this issue could undermine attempts to convince people they really care for the interests of the less wealthy.
Labour sources say they hope scrapping Non Dom status will raise 'in the high hundreds of millions'. The money will go towards the deficit.