Police have released CCTV footage which shows a bike being stolen in Norwich city centre in just six seconds.

A thief approaches racks outside Tesco on Guildhall and tries twice to rip the bike from the railing that it's locked to. He succeeds on the third attempt, snapping the lock before calmly riding away.

The Claud Butler hybrid was stolen on Sunday, February 9 and police have released the footage to highlight the ease at which bikes can be stolen, if they are not secured with a decent lock.

Superintendent Dave Marshall said: 'This footage highlights the ease at which bikes can be stolen if they are not secured properly. In this case it was gone in six seconds.

'All too often we see bikes secured with cheap cable locks. It makes no sense using a lock which costs £1 for a bike worth several hundred pounds and we would always recommend cyclists use D-locks.'

Officers are investigating the theft and anyone with information should contact PC Scott Ellis at Bethel Street Police Station on 101 or call Crimestoppers anonymously on 0800 555 111.