Assistant Commissioner Mark Rowley from the Met said: "We've taken a fresh look at policing London and London's obviously a world city.
"The recent census has shown what a big proportion of people in London come from far-flung places...It's important to us to be able to deal equally well with them as local offenders."
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Five activists were arrested after staging a three-hour demonstration which forced the closure of a tunnel at Heathrow Airport.
Those vying to be named the new Met Police Commissioner will speak to the Home Secretary, London Mayor and Policing Minister.
Monday's temperature was recorded at Kew Gardens, west London, where visitors enjoyed temperatures 10 degrees warmer than Milan at 8C.