Lewis Hamilton has returned from the Christmas break with some shocking news for his Mercedes team. His bombshell makes headlines around the world - with some calling it the biggest story in Formula 1 this century. Even if that’s a little far-fetched, there is no doubt that his decision has sent shockwaves through the F1 community.

At Mercedes, team principal Toto Wolff is used to having to react quickly - almost as quickly as his drivers on track. The Austrian has to face a barrage of media questions about the driver who has won six World titles with his team - and who has also become a friend. Holly Samos has exclusive interviews with the key protagonists.

While Mercedes take just a moment to reflect on Hamilton’s news, Williams are making their final preparations for the 2024 season. Logan Sargeant is back at Grove for his seat fitting along with his race engineer Gaetan Jego. Making sure the driver is comfortable in the cockpit is crucial, especially when racing on bumpy tracks at high speed.

The Mercedes factory at Brackley is also now getting back to the tick-list of preparations. The car needs a new paint job and the team has to be kitted out. With the 2024 season coming ever closer, the anticipation is building. And none more so than for the drivers, who get to drive these magnificent machines in the heat of competition.

F1:Back at Base was created and produced by Holly Samos and Sarah Holt and is an IMG Production for the BBC.