The test, called EarlyCDT-Lung, will include 10,000 high-risk smokers (defined as having smoked the equivalent of 20 cigarettes per day for over 20 years).
It detects signals produced by the immune system when lung cancer is present.
This can mean up to five years earlier than tumour detection.
More top news
Kevin Davis, 53, ran a medical company and helped to treat a 15-year-old who had taken a drugs overdose despite not having qualifications.
CCTV shows the 19-year-old victim being struck by a car and thrown metres into the air, before he lands on the pavement and slides along it.
Police are investigating a fresh allegation against John Worboys alleged to have taken place in 1997, ITV News understands.