We received the following Freedom of Information request on 25 January 2011 regarding the Gatsometer Type24+AUS and the use of the science of photogrammetry.
- What Home Office, Police or manufacturer’s guidelines are followed when performing the secondary check on a set of photographs made by a Gatsometer type 24+AUS speed camera?
- What are the legally acceptable methods used to perform the secondary check?
- Might a person trained and experienced in the science of photogrammetry (a photogrammetrist) perform a secondary check on a set of Gatsometer photographs?
- What are the minimum levels of training and qualification recommended by the Home Office or the police for a person carrying out such a secondary check on a set of Gatsometer photographs?
We released the following information on 22 February 2011.
- No secondary check instructions are issued by the manufacturer or the Home Office. The operating authority is responsible for the training of its operatives in the appropriate methods for performing a secondary check.
- The Gatsometer Type 24+AUS has been approved using a secondary check based on two images taken a known time interval apart. It was originally approved using photogrammetry but subsequently the Home Office agreed to the alternative use of a scale marking down the road, as it is less labour intensive and more easily understood by the courts.
- Persons trained and experienced in the use of photogrammetry may perform a secondary check for the Gatsometer Type 24+AUS. This device was originally approved with photogrammetry.
- The Home Office does not set training requirements. Training of officials is a matter for the operating authority.