London Mayor Johnson says he was "very interested to see" there was "an offer to arrest Andrew Mitchell".
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Emergency services were called to South Street in Enfield this morning, but the victim was pronounced dead around 30 minutes later.
Scores of flights were cancelled and drivers were warned to take care as the "mini beast from the east" swept in.
A campaign to save one of London's oldest football clubs had their fight heard in Parliament after their MP secured an adjournment debate.