A team of firefighters sawed their way into a limousine in Covent Garden this lunchtime as part of a demonstration. It was part of a Transport for London campaign to highlight the dangers of illegal limousines in London.
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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.