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.
More top news
David Perry told police he had been worried about what he might do because of his high hormone levels after the break-up of a relationship.
Parents of obese children rarely spot that their child is overweight, doctors warn.
Staying windy tonight with outbreaks of heavy, showery rain. Minimum temperature 8C.