Two people, including a 19-year-old girl, are in critical condition after a bus crashed into a tree in Kennington, a police sergeant at the scene has confirmed.
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The strikebreakers would provide a "pool of relief staff" so the city could still operate during the Tube strikes.
Dean Waite's prints of London icons are made with little more than a biro.
Ahead of tonight's planned strike, London Underground have offered new payments and terms to staff to avert the strike.