The current tires on the car are the Goodyear Gatorback OEM models correct? What was the plan for the replacements? The 315 rear tire sizes seem fairly rare with few options. Is that the same in the UK? Were you planning to go low cost? Or best available? Is the Michelin Pilot Sport All Season 4 (an OEM option on the C8) available in the UK?
https://youtu.be/lm6342C4CRo
https://youtu.be/G_11FJI4uu4