The Home Office is providing police with £3m for "head cameras".
The cameras will enable police officers to film everything they see. The government hopes the new cameras will lessen paperwork for police, increase the number of guilty pleas in court, and lower the amount of time officers have to spend giving evidence in court.
Officials hope the cameras will make it harder for criminals to lie convincingly in court, and decided to go ahead with a national roll-out after a successful trial in Plymouth.
Home office minister Tony McNulty said, "The assessment so far is that the deployment of this new technology could be very effective in reducing crime, acting as a preventative tool, and a means to enhance detections."