Sounds like you guys get a better grade of Vintage Racing than we in the U.S..
Over here we have Vintage Races, but for the most part they are not that hotly contested because the owners don't want to damage a car valuable as much as some of these cars have become.
Which brings up a sore subject with me,,,up until just a very few years ago you could pick up an ex-Formula or Can-Am cars for peanuts, they weren't worth much partly because there was no place to play with them, but with the advent of these historic and vintage racing series' the price has gone through the roof.