Speaking in the House of Commons, Home Secretary Theresa May said: "Could I also extend my sympathies to the family of the 13-year-old girl who died following a traffic accident involving a police patrol car on Sunday night.
"This matter is being investigated by the Independent Police Complaints Commission."
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Warm and humid over the next few days with rain at times in the north.
Warm temperatures will return to parts of the UK this week, hitting highs not seen since mid-July.
British runner Sir Mo Farah has completed his final track race in Great Britain by winning the 3000m at the Birmingham Grand Prix.