The Department for Transport (DfT) and National Highways (NH) have confirmed a significant technical anomaly affecting certain variable speed cameras across England’s Strategic Road Network (SRN).
This glitch, which has been in effect for years, has regrettably led to incorrect speeding enforcement action against thousands of motorists. The issue was revealed in a recent written statement to Parliament, with the government extending a formal apology to all affected drivers for the frustration caused.
The problem stems from a technical anomaly inherent in how some variable speed cameras interact with the digital signs displaying speed limits on certain motorways and A-roads. Officials have identified a slight delay between the camera system and the sign system. This critical delay meant that in specific situations, drivers were either not given sufficient time to react to a newly lowered speed limit, or they were incorrectly detected as speeding after the variable speed limit had already changed back up. The issue originated during a camera upgrade program that began in 2019. The anomaly was initially detected on the M5 and reported to the DfT on September 10, 2025, following a successful challenge to a speeding offence, and by October 13, 2025, it was confirmed as a national issue.
While acknowledging the severity of being wrongly penalized, National Highways has provided context on the overall scale of the error. The technical anomaly caused approximately 2,650 erroneous activations on the affected cameras over a four-year period since 2021. However, compared to the approximately 6 million total camera activations during that time, the anomaly impacted fewer than 0.1% of the total. Furthermore, the number of drivers wrongly penalized is smaller than 2,650, as not every erroneous activation resulted in a fine, and the affected cameras are only used on 0.2% of roads in England.
The government has committed to providing full financial and licensing redress for everyone impacted. Anyone who was wrongly fined will be fully refunded, and where points were incorrectly applied to a licence, these will be removed. Steps will also be taken to remedy any incorrect criminal prosecutions. To prevent further incorrect penalties, National Highways' camera supplier was instructed on October 17, 2025, to pause the transfer of variable speed data to police forces. Additionally, the National Police Chiefs' Council (NPCC) instructed all affected police forces to cancel wider ongoing prosecutions related to these infringements, leading to the cancellation of tens of thousands of speed awareness courses and the discontinuation of thousands of fixed penalty notices and criminal justice prosecutions.
Looking forward, a Home Office-approved solution to the technical problem has been agreed upon, and National Highways is working with police to implement it urgently. In the interim, National Highways will be putting increased traffic patrol officers in place as a safety measure. A deeper probe has also been ordered: NH has been instructed to investigate back to 2019 to ensure all affected individuals since the camera upgrades began are identified. Crucially, an independent investigation will be launched to determine how the anomaly arose and what systemic failures allowed it to persist, ensuring lessons are learned. The DfT stressed that road safety remains paramount and that speed limit enforcement will continue via various means, including mobile camera deployments, road policing patrols, and average speed checks, reinforcing that if you break the law, you can still expect to be punished.
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