An air ambulance flew to treat a seriously ill patient in St Albans.
Magpas Air Ambulance were called at about 9am on May 15 because a man in his 40s had suffered a cardiac arrest.
A bystander gave the patient CPR while pilot Chris Sherriff flew technical crew member George Phillips, Dr Scott Knapp and paramedic Sally Boor in the helicopter to near Drakes Drive.
The patient was put into a medically induced coma at the scene and then airlifted to Harefield Hospital in Hillingdon.
On arrival he was in a serious but stable condition.
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