From BBC News
A new police unit is radically improving the way that CCTV footage is processed.
The eventual aim is to turn the gathering of video evidence into a third forensic specialism alongside DNA analysis and fingerprinting.
There are 4.2 million cameras in the UK but until now there has been no dedicated police unit to deal with the collection and dissemination of CCTV evidence.
If the new Visual Images, Identifications and Detections Office (Viido), based at Southwark Police Station, is judged to be a success it could soon lead to the development of specialist CCTV units across the country.