It's not a sport yet. But it requires a lot of agility.

This is 'freerunning', also called Parkour, and it's here to stay.

The practice of jumping through urban obstacles started in the streets in France and now is going mainstream in Britain.

The country's first specialised academies have opened their doors, to encourage people to learn how to do it in a safe environment.

It's estimated that 35,000 people practise 'freerunning' regularly.\