FineFlip Guide
Speed Camera Appeal UK 2026
Speed cameras are not infallible. UK law requires that every camera used for enforcement must be type-approved by the Secretary of State, properly maintained, and regularly calibrated. When these requirements are not met, the evidence can be challenged and prosecutions can fail. This guide explains how each camera type works and what grounds are available for appeal.
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Check my speeding appeal freeFixed speed cameras (Gatso, Truvelo, SpeedCurb)
Fixed cameras are permanently installed at specific locations. Gatso cameras photograph from behind and rely on road markings painted at known intervals to provide a secondary speed verification. If the road markings are worn, missing, or incorrectly spaced, the secondary check fails and the evidence is weakened. Truvelo cameras photograph from the front and use piezoelectric strips embedded in the road. Both types must be regularly calibrated and the calibration certificates must be available on request.
Mobile speed cameras (vans and tripods)
Mobile cameras operated from vans or on tripods use laser or radar technology. The operator must be trained and certificated, the equipment must be calibrated before each deployment, and the setup must follow approved operating procedures. Common challenge grounds include operator error, cosine angle effects on laser readings, and failure to produce deployment logs.
Average speed cameras (SPECS, VECTOR)
Average speed cameras use Automatic Number Plate Recognition (ANPR) at two or more points to calculate average speed over a distance. Grounds for challenge include incorrect distance measurement between camera points, clock synchronisation errors between entry and exit cameras, vehicle misidentification, and temporary speed limits that were incorrectly signed or had expired.
Officer with speed gun (handheld radar/laser)
Handheld devices are subject to the same calibration and type-approval requirements. The officer must be trained in the device, it must have a current calibration certificate, and the reading must be taken from an appropriate angle. Laser devices in particular are sensitive to the cosine effect — if the officer is not directly ahead or behind the vehicle, the reading may be artificially low or high.
Legal grounds for challenging camera evidence
- Camera not type-approved by the Secretary of State
- Calibration certificate expired or unavailable
- Road markings (for secondary verification) worn or missing
- Operator not properly trained or certificated
- Deployment records not available
- ANPR misidentification between camera points
- Speed limit signs not compliant with TSRGD 2016
- NIP not served within 14 days
How to request camera evidence
You are entitled to request disclosure of the camera evidence, including photographs, calibration records, operator logs, and the camera's type-approval certificate. Write to the camera partnership or police force handling your case. Under the Criminal Procedure and Investigations Act 1996, the prosecution has a duty to disclose material that might undermine their case.
Related guides
Frequently asked questions
Can speed cameras be wrong?
Yes. Speed cameras can produce inaccurate readings due to calibration issues, equipment malfunction, incorrect positioning, or interference. All cameras must be type-approved and regularly calibrated to produce admissible evidence.
How do I know if a speed camera was calibrated?
You can request calibration records from the camera partnership or police force. Under disclosure obligations, they must provide evidence that the camera was properly calibrated at the time of the alleged offence.
Can I appeal an average speed camera fine?
Yes. Average speed cameras calculate speed over a distance between two points. Grounds for appeal include incorrect distance calculation, camera synchronisation issues, vehicle misidentification between entry and exit cameras, and road works affecting the speed limit.