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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A lamp in the tower which houses Big Ben is to be switched off for the first time in more than 70 years.
Sir Bruce entertained audiences for more than seven decades.
Work in the tower will also pause over the bank holiday weekend.