The Mayor's Office has confirmed Boris Johnson authorised the highly-controversial purchase of water cannon - despite not yet getting the go-ahead from the Home Secretary.
City Hall says buying the German vehicles now will mean savings of £2.3million compared to buying new water cannon and ensures they are ready as soon as possible'.
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The 47-year-old man died shortly after 3pm on Tuesday.
Specialist explosive detection dogs searched through the town examining letter boxes and phone booths for signs of potential devices.
Temperatures reached 29.1C in St James's Park, central London.