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Police cadets caught a driver going at 43mph in a 30mph zone as they checked the speed of 400 vehicles.
The team worked with the force's Sittingbourne troop on Saturday at four areas across Sittingbourne and Sheppey.
They were stationed in Woodstock Road in Sittingbourne, Chestnut Street in Danaway and Scocles Road and Minster Road in Minster.
Each cadet used speed guns to record the vehicle's speed and spoke to drivers who had been stopped because they were going too fast.
The highest speed recorded was 43mph in a 30mph zone.
PC Mat Booth, who helped the cadets, said: "The cadets did a fantastic job and learned a lot about road safety, and interacting with the public, in the process.
"Their efforts led to numerous motorists being challenged for their manner of driving.
"Throughout the course of the year we will continue to get the cadets involved in community initiatives to help develop their knowledge of policing."
It was part of the Kent Volunteer Police Cadets scheme, which opened in September 2016 to 13 to 17-year-olds.
Cadets meet once a week for two to three hours during term time and volunteer three hours each month to help with a community project.
To learn more click here.
To read more about what is happening on Sheppey click here and here for more from Sittingbourne.