An elite officer from Scotland Yard's Diplomatic Protection Group will be sentenced today for sharing obscene images using his mobile phone.
An investigation found that James Addison shared illegal material with other officers while on duty. His roles included guarding Downing Street.
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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.