A London man is facing a charge of false representation as a peace officer after police witnessed a vehicle using a siren and flashing lights.

Police say just before 6:30 p.m. on Thursday, a silver four-door 2007 Dodge Charger was senn driving in the area of Commissioners Rd and Leathorne St with its emergency lighting activated.

Several motorists were pulled over to the side of the road as a result.

Terry Mertick, 50, is facing a charge of false representation as a peace officer.

He also faces a charge of possession of a prohibited weapon when officers located a flick knife in the car.