A man clocked by police driving at 173mph in a 50mph zone has been spared a jail sentence after it was found his sports car was incapable of travelling that fast.
Officers recorded Tex O'Reilly driving at 173mph in his Lotus Elise as he drove along a country lane in Derbyshire last July, Derby Crown Court was told.
But defence lawyers successfully argued the 36-year-old Derbyshire builder's unmodified car had a top speed of 127mph.
He pleaded guilty to dangerous driving on the basis that he had driven at just 105mph.
A recording of 173mph would usually have warranted a jail term, but the prosecution failed to disprove the defence claims and accepted O'Reilly's basis of plea.
The father-of-three from Canal Bridge, Willington, pleaded guilty to a charge of dangerous driving and was given a £5000 fine and two-year driving ban.
Judge Andrew Hamilton said: "May I make it absolutely clear that had you been driving at 150mph you would have been going immediately to prison.