A motorist has become the first person to successfully appeal against a speeding conviction linked to a controversial stretch of the A20, where thousands of drivers were fined amid confusion over conflicting speed limit signs.
John Abbott, from Kent, had his conviction overturned at Kingston Crown Court last month, following a long-running dispute over speed restrictions on the Kent-bound section of the A20 in Sidcup, south-east London.
Conflicting signs sparked fines
The controversy began in October 2023, when a temporary 40mph speed limit was introduced along the road due to concerns over flooding. However, a rogue 50mph sign remained in place, creating confusion among motorists who were subsequently caught exceeding the lower speed limit.
The restrictions remained in force until October 2024, with numerous drivers receiving fines despite the contradictory signage.
Driver calls penalties a ‘massive injustice’
Following his successful appeal, Mr Abbott said he “was extremely pleased, not just for myself, but for the thousands of drivers that have been fined in this case”.
He described the penalties imposed on himself and other motorists as a “massive injustice”, arguing that the consequences extended far beyond the initial financial penalties. According to Mr Abbott, drivers faced increased insurance premiums and restrictions on their ability to drive, with some experiencing difficulties travelling to work and earning a living.
TfL defends temporary limit
His successful challenge marks a significant development in the dispute, which has seen motorists question the fairness of penalties issued while contradictory speed limit signs were displayed.
However, Transport for London has defended its decision to introduce the temporary restriction, maintaining that the reduced speed limit was necessary because of flooding concerns. The transport authority said it “remains confident” that its decision to enforce the 40mph limit was correct.
A TfL spokesperson said: “Safety is our number one priority and we temporarily introduced a 40mph speed limit on the A20 Sidcup Road in response to a number of incidents caused by ongoing flooding issues, which posed a risk to life. After we repaired and resurfaced the road, the speed limit was returned to 50mph. We remain confident that enforcement of the speed limit here was necessary, given the safety risks, and we will be resisting the appeal challenging our enforcement action.”
MP questions Mayor
Tory MP Laura Trott has questioned what London Mayor Sadiq Khan is going to do to notify drivers who have been issued speeding fines “incorrectly”.
The question puts pressure on City Hall to address the thousands of drivers who paid fines or accepted penalty points during the year the conflicting signs were in place. If the signage was unlawful, those penalties could be open to challenge.
What happens next
Mr Abbott’s successful appeal could open the floodgates for similar challenges. With thousands of drivers fined on the same stretch of road under the same contradictory signage, campaigners believe many more convictions could be overturned.
The case also raises broader questions about how temporary speed limits are communicated to drivers. When a 40mph restriction is imposed but a 50mph sign remains visible, motorists are placed in an impossible position — and the courts are now being asked to decide who bears the cost of that confusion.
TfL says it will resist the appeal challenging its enforcement action, setting up a legal battle that could have implications for temporary traffic orders across the capital.
For drivers who were fined on the A20 during the restriction period, the advice is to seek legal guidance on whether their own case could be challenged — though each case will depend on its specific circumstances.
More on London’s roads: our earlier coverage of the A20 speed restriction ruling and the Rotherhithe Tunnel closure.
