According to a thread on a well-known site this is a TVR-Lea Francis special
But I would be happy to give up the point to iani, as it was the info contained in his guesses that enabled me to find it. A guy named Tony Stanton from the Rochdale Owners' Club confirms in the thread that the car is made up from the parts iani mentions in his Feb16 post, plus a Lea Francis engine. It's from 1956.