https://www.tcr-uk.co.uk/2024-tcr-uk-gen-1-cup/
New 'Gen 1 Cup' sub-class for 2024. Open to older spec Audi, Cupra, Golf and Astra. Possibly more cars to be added later.
Seems like a sensible idea. There are a few drivers already on the grid who are unable or unwilling to upgrade to the latest equipment, and there are plenty of older cars on the market.