I'm not sure whether or not it was the opening of the Stewart Wilson Car Dealership on Clark Way, but these photos were taken on 10 November 1984 when they had arranged for a Williams (no relation!) Grand Prix car and a Lancia rally car to be on display outside the showroom. I took our children, Paul and David, down to have a look.
The two cars parked outside the showroom and looking across Clark Way towards Ashton Brothers
David (in buggy) and Paul wondering what the funny car was (it's a 1983 Williams FW08C)
This is a 1983 Lancia Martini 037 rally car. Paul looks very thoughtful.