The Met police will launch a major new crackdown on crime, disorder and anti-social behaviour in the West End later today.
The campaign, called Operation Trafalgar, includes an area with a bed in it to help worse-for-wear revellers sober up.
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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.