https://wheels-and-things.com/en/2021/07/retrospective-4-mavericks-in-motorsport-the-btcc-twr-volvo-850-estate
BTCC 850 history
Great article and actually accurate/factual, unlike the Jalopnik or other authored articles that will tell you that the BTCC cars were 850R based, etc.
Good reading , Murry Walker was the one and only voice of BTTC !