The Stratford Festival of Motoring takes place over the May Bank Holiday Weekend, on Sunday 1st and Monday 2nd May. It is set in a park in Stratford upon Avon, and includes displaying your car in the park, plus a Cavalcade drive round the town, plus the option of a run round the Warwickshire countryside. Cost is £15 per car & passengers for the Display and Cavalcade, £20 if you want to go on the run. You can choose to go on either one of the days, and have to be parked up by 10am.
You can book via their website: Stratford Festival of Motoring