Historic saloon racing/rallying on Sky

Great documentary on Sky Sports last night, as filler in their motorsport programme - anyone see it? I missed the first few minutes but it was a tour of Britian circa 1974 with famous drivers (Hunt and Hill) in off-the-shelf saloons. The event was a mix of races, rally stages and drag racing. Excellent race footage from Llandow, Oulton, Brands and (night racing) at Snett. By the way, when did they come up with the idea of run-off at circuit? I (okay, my car) would have never have made it through my first few years of racing back then...