Young people and celebrities have come together at a conference in Canary Wharf to try and find new ways to tackle bullying.
Jodie Marsh and dance duo Twist and Pulse are among those taking part.
Martin Stew was there and also spoke to Anti-bullying Ambassador Georgeluca Lopez Nunn.
More top news
Corbyn was unveiling a poster less than a mile away as Khan gave his final campaign speech to party supporters in London.
Hay fever is an allergic reaction to airbourne pollen. There are 2 million sufferers in London (that's one in 5 people).
The man suffered head injuries after falling from Westminster Bridge and landing on concrete steps.