The driver was stopped on the way to the Santa Pod Raceway.
A car painted to look like a Japanese police vehicle has been seized by motorcycle patrol officers.
It was being driven to the Santa Pod Raceway, near Wellingborough, where a one-day event showcasing the "fastest and finest" Japanese cars and motorcycles was taking place.
A Northamptonshire police patrol pulled over the black and white two-seater sports car - emblazoned with the word "police" and Japanese characters - on Saturday.
In a post on X, officers said they stopped the car because it had "flashing rear red lights" and found it was not insured. It was seized and the driver reported.
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