Wednesday 24th July sees the 26th Anniversary of This Event Once a year, Harpenden Common comes alive for half a day with around 1000 classics cars, motor cycles and scooters. There you’ll find a Chevy Bel Air rubbing shoulders with a 1927 Trojan, and a rare 1978 Matra Bagheera with a 1959 Berliet. Plus 10,000 admiring spectators. Little wonder Classics on the Common, already Britain’s biggest mid-week classic car show, now ranks among the top events in…