Twenty one year old Naomi Oni claims to have suffered burns and lost her hair and eyelashes after the chemical was thrown at her in Dagenham last December.
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Across the country people are pledging to run 3.7 miles in memory of Matt Campbell who died while taking part in the London Marathon.
Jonathan Munro is giving evidence during the latest stage of a High Court trial in London.
But while he wasn't showing it, PC Tyler O'Hare was enjoying every minute of it.