The crowd was also played a video message from former England captain David Beckham.
After the Government committed to giving an extra £375 million to help feed the world's poorest children, Beckham said:
We've had good news. Earlier today the Prime Minister met with other world leaders and has made a real commitment to ending child malnutrition and hunger. There is more to do though and you can help.
More top news
A second man has been arrested on suspicion of the murder of a schoolgirl who went missing more than 20 years ago.
Kitty Hawk's Flyer is an impressive attempt at tackling what humans have dreamed of for years - a flying vehicle.
Workers are to vote on industrial action as they fight to save their jobs and the future of the South Wales plant, ITV News has learned.