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.

A visitor to a horse fair in Cumbria needs help after a cardiac arrest. A 12-year-old girl is treated for injuries after a collision with a vehicle. In County Durham, Peter is found confused and injured after a fall out walking in the countryside.

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.

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.

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.

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

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.

In the Yorkshire Dales there's a dramatic hillside rescue for a seriously-injured paraglider.

Helen is trapped in her car after a crash on the A66. Golfer Michael has collapsed with a suspected cardiac arrest. Jamie, who's 15, has fallen 10 feet and has a broken jaw and possible spinal injury.

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.

A head-on car smash in Cumbria leaves Nick's life hanging in the balance. Heli-meds help Craig who has come off his motorbike and smashed headfirst into a signpost. And medics battle extreme weather conditions to reach a man trapped under his JCB.

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.

In Lanchester, heli-medics struggle to free Malcolm, who's trapped in his mangled car. Tree surgeon Terry falls from height in Ashdon, breaking his femur. And a motorbike accident in the Peaks sees medics rushing to the aid of Jamie.

A motorcycle collision on the M25 creates chaos as the heli-medics close carriageways to treat a driver with an injured leg. A runner has a cardiac arrest during a 5k park run. And a man's fallen down some stairs and fractured his femur.

Charlie has life-threatening injuries after coming off his dirt bike at height. The heli-medics race to treat him as a matter of great urgency. And worried parents watch on as medics treat their five-year-old child who is having seizures.

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.