Read the news story and John's blog as it happened.
Henry Catchpole sneaks around the pits here.
Audi RS5 review – Audi Sport's super estate eyes the BMW M3 Touring
Save £24,000 on a new BMW M4 Competition – massive discounts on M’s flagship coupe
New Cupra Born arrives as a feistier Volkswagen ID.3, with bucket seats and up to 322bhp