Caught on Camera: Gangs & Guns

A one-off edition of the documentary in which journalist Nick Wallis reveals how CCTV and technological advances are helping to ensure convictions, focusing on criminals in London involved in robberies, thefts, drug crimes, street brawls and weapons offences. In Soho, police officers monitor the activity of the area's 100,000 nightly visitors from a CCTV control room in an underground bunker, while in Lambeth the air support unit is called in when an armed gang are seen rampaging through the streets