THOUSANDS of drivers will be refunded after being wrongly issued with a penalty notice.
Around 4,700 motorists in Sheffield were mistakenly slapped with a penalty due to a technical error.
Sheffield City Council said those affected drove into the Clean Air Zone (CAZ) between Sunday March 26 and Thursday April 6 with one additional case on April 12.
The error occurred at a third-party supplier level when the clocks went forward from Greenwich Mean Time into British Summer Time.
It means they were given the wrong timestamp which then meant they were charged £120.