Margaret Hodge, the chair of the Public Affairs Committee has said the HMRC are "behind the times" when it comes to tax avoidance schemes.
Speaking to Daybreak she said it was a "cat and mouse game", with those who exploit legal loopholes, always one step ahead.
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Temperatures will remain close to freezing.
The prime minister's announcement came as international leaders gather in Paris on the second anniversary of the climate change plan.
Prime Minister Theresa May said in October the Government will shift towards an organ donation system in England which presumes consent.