A 26-year-old man has been arrested after a shot was fired at two police officers as they sat in a marked car. The officers were investigating a burglary in Camberwell and were not injured.
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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.