Eyewitnesses say that police hunting for a man suspected of killing an off-duty officer are searching an area near to the village green at Writtle, Chelmsford, amid reports that a body has been found.
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Muslim leaders condemned the "heinous and appalling" Westminster terror attack.
Travis Frain is recovering in hospital and has posted a photo to Twitter of Prince Charles by his bedside.
Acting Commissioner Craig Mackey led new policemen and women in paying their respects at a passing-out parade in Hendon, north-west London.