Police have lifted an exclusion zone in Warrington town centre after reports of a car parked suspiciously.
The vehicle, said to be covered in fixed penalty notices, had been left while the owner went on holiday.
Army explosives experts were called in to examine the car in Museum Street but declared it safe.
A number of offices were evacuated and the town's 170-year-old annual walking day procession, which attracts thousands of people, was diverted.
A spokesman for Cheshire Constabulary said: "The suspicious vehicle has been checked and all is in order.
"The owner had been on holiday and had left the vehicle there. It was checked due to the number of fixed penalty notices on the vehicle.
"Due to extra public vigilance and the incident in London we felt it only right to check that vehicle thoroughly."