London's Olympic Ambassadors are back on the streets in a pilot project at St Pancras Station.
The volunteer force will offer advice to visitors on how to get to attractions, restaurants and shopping areas.
But, as Rags Martel reports, they started with something a bit more dramatic.
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The unlicensed events unfolded on Saturday night at Clapham Common and Tooting Bec Common.
A 37 year old man who was taken to hospital after getting into difficulty in a stretch of water near Maidenhead has died.
Jonty Bravery, who is mentally ill, has been jailed for 15 years after throwing a six year old boy from the Tate modern balcony.