John Hindhaugh looks in detail at the ACO’s new prototype rulesets, LMH and LMDh, with the help of Porsche’s Pascal Zurlinden, Audi’s Chris Reinke and Toyota’s Alex Wurz, plus Andrew Cotton of Racecar Engineering.

As the Formula 1 season finally gets underway in Austria this weekend, it’s time for a new preview. John Hindhaugh is joined by Joe Bradley and Nick Daman to discuss what’s changed since March.