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For thousands of recreational pilots, uncontrolled airspace - the skies beyond commercial routes - are a place of freedom and adventure and for many, flying in them can become an obsession.

Al Coutts and Willie Cruikshank are the Wildcats, two former RAF pilots who perform aerobatic stunts at air displays across the UK. With several recent tragedies at air shows, Al and Willy must finish their display season safely.

Julia Foxwell is a champion skydiver who relinquished her crown after having her first child. Now she is juggling motherhood with an intense training schedule as she attempts to win again at the National Skydiving Championships.

Pete Dolby has been flying balloons for over a quarter of a century - now he is attempting to fly Britain's first solar balloon, powered using just the sun's energy. The experimental balloon will be launched at Europe's biggest ballooning event - the Bristol Balloon Fiesta.

Elsewhere, Ady Dolan, NATS air traffic controller at Heathrow, works the most congested and highly regulated patch of sky in the UK - the congested skies above the capital.