PC Simon Harwood, who was cleared of killing Ian Tomlinson, will be sacked after being found guilty of gross misconduct by a disciplinary panel.
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Salih Khater was held on a terrorism charge and further arrested for attempted murder.
Organisers said five people were taken to hospital including a 12-year-old boy and an 83-year-old man.
Blue has spent 300 days waiting for a new owner.