Two men who were found in a car after they were stabbed to death have been named as Aaron Carriere and Josiah Manful.
No one has been arrested and police are appealing for witnesses to come forward. Any one with information can call the incident room on 020 8345 3715 or Crimestoppers anonymously on 0800 555 111.
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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.