The MG ZR/ZS were all ex BTTC cars or from the MG class that existed in the mid-2000s with the V8s, racing in the MG class.
That Escort was racing in regularity, where you try to lap with all your times at the same time.
I just got back from the Historics at Phillip Island, I'm going to have to go thorugh the photos I took to upload. over 500 cars, a lot of really interesting stuff.