Jenson Button believes Lando Norris will be returning this season as a "formidable force" after winning his first Formula 1 world title last year.
Speaking on Sky Sports F1 ahead of testing in Bahrain, the 2009 F1 world champion reflected on his experience of making the most of a change in regulations as he called the 2026 changes "the biggest one we've probably seen in modern F1" given the overhaul of the aerodynamics, power unit and chassis.
