A man from Devon accused of putting a suspicious device on a London tube train has denied carrying an explosive.

Damon Smith from Newton Abbot appeared at the Old Bailey earlier via video link from Belmarsh jail.

He spoke only to confirm his name and enter a not guilty plea.

Police allegedly discovered the device after two members of the public found a backpack on an underground train in October last year.

It was handed to the driver, who inspected the backpack, prompting the evacuation of North Greenwich Underground station.