Detectives in Greenwich have arrested a 53-year-old woman in Deptford in connection with an incident in Eltham High Street on Thursday 13th September where a baby was given an unknown substance.
She remains in custody at a south London police station.
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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.