Around 200 school children are taking part in a parade at 10am today to mark the official opening of the Queen Elizabeth Olympic park. As part of the festivities, acrobats will be performing an aerial spectacular and jumping from the Orbit tower.
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The terror attack carried out by Khalid Masood at Westminster that left four people dead lasted less than two minutes say police.
Two knives were found at the scene in Islington, North London, and the suspects fled on foot before being arrested.
The family of the police officer who was murdered in the Westminster attack have thanked those who were with him 'in his last moments'.