'Crystal clear ' footage was found by worker based 50ft away from scene . Police reportedly only knew about video when worker flagged it up to them . Met refused to release CCTV , despite claims it 's better than existing video . more than one week later , Scotland Yard released CCTV a day after images were revealed in the media .
'Crystal clear ' footage was found by worker based 50ft away from scene . Police reportedly only knew about video when worker flagged it up to them . Met refused to release CCTV , despite claims it 's better than existing video . Last week , Scotland Yard released CCTV a day after images were revealed in the media .