http://www.out-law.com/page-7529
"The Home Office is reviewing the legal status of automatic number plate surveillance cameras after the Chief Surveillance Commissioner advised that they could be operating unlawfully.
OUT-LAW has also discovered that the Association of Chief Police Officers (ACPO) advises forces that warnings about the use of the cameras can be placed further down a road than the cameras themselves and still comply with legislation. This could breach the 'fair processing' principle of the Data Protection Act which requires visible warnings to be placed before the camera location."
