In the months between the chequered flag in Abu Dhabi and the five red lights in Australia, Formula 1 teams are still be racing. They're building in factories, testing on simulators and wind tunnels, working flat-out to get their cars ready for a new era.

New car design and power unit rules will change the game in 2026, so the work F1 teams do this winter is more important than ever. Williams Team Principal James Vowles and F1 Correspondent and Presenter Lawrence Barretto join Christian Hewgill to explain all.

Lawrence tells us why the teams have less time than in previous winters to be ready for the new season, starting with the first of three pre-season tests in January. James explains the work taking place at F1 team factories, and why 2026 is such a big change.

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