I think it was October 1971 when we went to the motor show because the new Range Rover was one of the cars I remember thinking I'd like one of those! Probably not an obvious choice, with much more exotic, luxurious and sporty cars on display.
My only other visit to the motor show was a bus trip to the NEC, which did co-incide with the "Allegro's got vroom!" ad campaign must have been around 1980.
There are some interesting short video clips from British Pathe of old motor-shows which may stir some memories. This is the "1962" treatment.
regards Neil


