They've been described as 'the beating heart of the Olympics'. Without them the games simply would not have happened. In fact, our army of Olympic volunteers did such an incredible job that the Mayor's office is now stepping up plans to get them involved in other major events.
And this afternoon thousands of those volunteers packed into Trafalgar Square as Boris Johnson paid tribute to them with a special carol concert. Toby Sadler was there.
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David Cameron said the Met proved it can "do more with less" and declined to criticise the Mayor of London for his water cannon spend.
A group of disabled activists threw toys and balls at him as he entered the conference.
A wet start to the week and the unsettled weather is set to continue over the next few days.