There are fears over Olympic security after a known terror suspect entered the Olympic Park five times - despite being trailed by police. The alleged Al Qaeda militant was arrested after breaching an order banning him from the area.
It raises serious questions over security less than three weeks before the Games are due to start. Piers Hopkirk reports
More top news
Hundreds of pupils from Alperton Community School in Brent, London,cheered and waved flags as Andria Zafirakou arrived holding the prize.
Earlier, this week Kensington and Chelsea Council admitted spending almost £21 million keeping survivors in hotels.
Defence Minister Tobias Ellwood sais the UK is going through a "dark chapter" .