New figures show the largest ever demand for food from the capital's foodbanks. The Trussell Trust says 42,000 people in London have received at least three days emergency food over the last year, almost triple the number who needed help in 2011-12.
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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.