When most petrolheads hear the words 'car show', they think of gatherings of ultra-rare classics worth hundreds of thousands of pounds and displays of exotic supercars. It is designed to celebrate long-forgotten everyday family cars many of us would have owned during the 1970s to 1990s, including cars like 1982 Vauxhall Cavaliers Some 2,000 once-popular vehicles from the 'unexceptional era' …