Jodie Marsh said: "The Diana Award National Anti-Bullying Ambassadors Conference is a great event that brings hundreds of young people together to stop bullying. I wish there was an anti-bullying programme that was available to me when I was younger."
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Hackney actor Idris Elba and Croydon rapper Stormzy donned Santa outfits and paid Newham and Whipps Cross children's wards a visit.
James Scobie QC represented Tokyi Ajibola, otherwise known as Trapstar Toxic, in his trial over an alleged gang-related shooting.
The memorial will focus on remembering the 71 victims of the tower block fire.