In 2004 former and current BTCC drivers took part in a one-make race driving identical SEAT Cupra Cup cars. The race was named "BTCC Masters" and included drivers such as John Cleland, Tim Harvey, Jason Plato, Matt Neal, Gabriele Tarquini, Patrick Watts, Julian Bailey, Alan Menu, and others. In total, 16 BTCC legends took part. Grid positions were drawn from a hat. Anthony Reid was on the front row next to John Cleland. The start didn't go to plan for Anthony when he accidentally jumped the start but immediately realised his mistake and stopped, and was subsequently swamped and relegated to 8th place... what happened next was amazing, watch the video!
There is a Wikipedia page about the race: