A driving instructor who tried to use fake sat nav data to avoid a speeding ticket is facing a prison sentence for perverting the course of justice.
Shaun Richards attempted to use records from his personal satellite navigation system as proof that he couldn't have been speeding on the date and time he'd been caught by the local Safety Camera Partnership.
But the data he supplied as evidence in court had been falsified. Mr Richards went to the trouble of retracing his journey over Dartmoor at a legal speed and used that information to replace the original GPS log.
Unfortunately for the 49 year old, he failed to take into account the fact that his second trip was made in the winter - a different time zone to his original summer time drive from Essex to Tavistock.
The mistake was spotted by eagle-eyed Steven Callaghan of Road Safety Support, who was hired by the prosecution to investigate the sat nav data submitted by Mr Richards.
He said: "The GPS logs were in Greenwich Mean Time and I knew Richards had been driving on June 1st which is British Summer Time."
Faced with hard evidence of his fraud, the self-employed driving instructor pleaded guilty to perverting the course of justice in Plymouth Crown Court, and could receive a prison term when he's sentenced next month.