Students from St Martin-in-the-Fields High School tell ITV's Ria Chatterjee that they were astonished to hear that Will Smith would be coming to see them.
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Six people were injured after they were hit with the substance during an "altercation" between two groups at a shopping in east London.
Save Your Uber in London was set up after it was announced the firm would not have its licence renewed when it expires next week.
Survivors are still traumatised, homeless and want answers.