The investigation was prompted to look into Basildon Hospital after two consecutive years of higher than expected deaths. According to NHS statistics, which also take into account patients who died within 30 days of being discharged:
Between July 2010 and June 2011 there were 263 more deaths than the 1658 expected.
Between July 2011 and June 2012 there were 244 more than the projected 1699.
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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.