Police will "fully assess" a recording of comments apparently made by Rupert Murdoch during a meeting with News International journalists.
Assistant Commissioner Cressida Dick confirmed the force is trying to get a copy of the clip of Mr Murdoch speaking to members of staff from the Sun in March.
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Owners must also prove they have something to pick up dog mess with under new rules imposed by one council.
The former prime minister made the comments as he prepares to return to politics saying he wants to be "part of the debate" on Brexit.
The new measures would mirror childcare vouchers and see workers sacrifice some of their salary to benefit.