The Metropolitan Police are to bring their expertise to the search for Madeleine McCann, the Home Office says.
Madeleine went missing aged three on holiday in Portugal in May 2007.
David Cameron has written to her parents telling them the home secretary will be in touch to set out the new action involving the Met Police.
Kate and Gerry McCann, of Rothley, Leicestershire, said they welcomed the news, which came after they asked Mr Cameron to launch a review of the case.
In a statement they said: We welcome the government's response. This is clearly a step in the right direction.
The expertise of the Metropolitan Police is renowned and we are reassured by our government's commitment to the search for Madeleine.
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