Next questioner quotes Boris's own 2008 manifesto at him about extra minutes in an ambulance being difference between life and death. #pqt
The Mayor of London and London Assembly members are taking questions from the public on transport, housing, policing, and London's economy. But members of the Save Lewisham Hospital Campaign have appeared in force to push Boris to support the hospital.
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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.