Boris Johnson says he is not against the idea of a lorry ban at rush hour. The Mayor says 2 out of 14 recent deaths were during the morning peak. But Boris warns a rush hour ban would risk a "great glut of lorries" the minute the peak was over.
More top news
PC Keith Palmer, 48, stabbed by Khalid Masood while on duty in the grounds of the Palace of Westminster last Wednesday.
Those gathered on the bridge fell silent at 2.40pm - the time the first call was made to police exactly seven days ago.
Simon Lucy, 61, filmed hundreds of hours worth of footage on the London Underground network.