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Armed police swooped on a coach and shut down a motorway after a passenger spotted a man craftily smoking a fake cigarette into a bag and mistook it for a terror threat.
After closing the M6 toll road for more than four hours, police admitted the alert - which was treated like a major chemical incident - was sparked by a 'health improvement aid for smokers'.
The passenger had been inhaling the e-cigarette device, which emits water vapour and is legal to smoke on board a vehicle, but covered it with a bag so those around were not able to see what he was doing.
Electronic cigarettes simulate smoking and the flavour of inhaled tobacco. They are often used by people trying to give up.