John is trapped in his car after a head-on collision on the A1. Heli-medics fly to one of Britain's most remote roads to help Caroline, injured coming off a motorbike.

Heli-medics race to a skydiver suffering serious injuries after smashing into a house. And, there's a race to reach a man who has fallen 40 feet from a ladder. Biker Hanna is trapped with multiple injuries after she ploughs into a road sign.

In Cambridgeshire, the heli-medics race to treat a cyclist with a time-critical brain injury. On the Norfolk Broads, Tom breaks his thigh bone jumping off a boat. Cedric, an 87-year-old pilot, is put into an induced coma.

In Yorkshire, Neil needs urgent attention after a fall from his motorbike. The medics head to the banks of Ullswater when a walker goes into a cardiac arrest. In Berkshire, Darran suffers nasty burns in an accident lighting a bonfire.

In Oxfordshire a motocross collision leaves 12-year-old Lewis with a painful broken thighbone, and paraglider Lucasz id treated for multiple fractures after a crash on the Cumbrian coast.

The air ambulance teams race to help mountain biker Rob in the Cumbrian mountains, off-road motorbiker Dean, who's taken a nasty tumble, and 15-year-old Robbie, who's fallen from a cliff

The air ambulance teams cut short an appearance at a charity event to treat a dirtbiker who's crashed at speed. Another off-road motorbiker breaks his thigh in an accident in the Pennines.

Medics fly to the aid of a teenage mountain biker, a multi-vehicle collision in Bedford results in potentially life-changing injuries, and Nicola steps in to save her husband Michael's life when he has a cardiac arrest.

Air ambulance teams rush to help Bill after his car flips. Malcolm, who has had a cardiac arrest, is put under emergency anaesthetic on a hospital helipad.

In Hartlepool, the heli-medics are tasked with treating a man hit by a train. Cyclist Trevor suffers serious injuries after a collision with a car, and 12-year-old motocross biker Arai in Cumbria is flown across the country for emergency surgery.

In Hertfordshire, the heli-medics help a man fighting for his life following a cardiac arrest. A tumble on an obstacle course leaves fun-runner Vijitha with a painful open fracture, and seven-year-old Imogen suffers an impalement at the bike track.

Headteacher Andy has had a cardiac arrest. Rob's trapped under a pallet of granite in Ipswich. Thirteen-week pregnant Katie's having seizures and the air medics are on their way.

In East Anglia, a dialysis patient is seriously ill and desperately needs fluids. And on Canvey Island, the medics take over the breathing of a motorcyclist who's bleeding from his ear.

A painter-decorator's had a nasty fall and may have a bleed on the brain. A motorcyclist is given ketamine after breaking a leg. And Doreen has been trampled by a foal.

Two air ambulance teams scramble to help a critically injured dad and his two young sons after a car collision. And Martin has breathing difficulties in Bracknell.

The medics help Penny, who's had an anaphylactic shock from a wasp sting, and motocross rider Carl, who's had an accident and has dislocated his hip.

On the Norfolk Broads, holidaymaker Caroline needs the help of East Anglian Air Ambulance after a boating accident. Thames Valley Air Ambulance attend a large collision on the A40.

Air medics help a teen with major brain injuries after colliding with a car. Ten-year-old Jack is confused and nauseous from a bang on the head.

The air ambulance teams struggle to get to a horse rider, who has badly injured her ankle, in a forest in Norfolk. Meanwhile, Steph is trapped with multiple injuries after a bed smash in Northumberland.

A motorcyclist has multiple injuries after colliding with a van. And Thames Valley Air Ambulance race to help a man in cardiac arrest in High Wycombe.

The air ambulance teams help mountain-biker Ivan, who has sustained a serious head injury in a remote part of a forest, and a four year old Abithan, who has broken his thigh bone.

Air ambulances bring the emergency room to critically ill or injured people across the country, including a man in cardiac arrest and a woman who's been trampled by a foal.