2025 British GT GT4 champions step up to GT3 for 2026

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Current British GT GT4 champions, Marc Warren and Jack Brown will step up from their title-winning GT4 machinery into the 720S GT3 EVO for 2026, seeing them both make their senior class debut at the season-opening Silverstone 500.

Marc and Jack were the standout pairing of the domestic championship’s 2025 season, claiming five wins across nine races to become the first Pro-Am pairing to secure the overall title since 2016.

“I’m delighted to be returning to the British GT Championship with Optimum Motorsport for the 2026 season. Marc and I enjoyed a very strong year together last season, and moving up to GT3 feels like the natural next step for us,” said GT4 champion, Jack Brown.

“We’re both excited to take on a new challenge and continue learning as we head into the 2026 season.”

Returning for this season, the duo will step up into the manufacturers GT3 car, making the switch from the Artura which the team, and Jack Brown have won many titles with since its debut at Oulton Park in 2023.

Marc and Jack will advance into GT3 Silver-Am, a class that whilst can still battle for the outright race wins, will remain its own ‘championship within a championship’.

“I’m absolutely buzzing to move up to GT3 this year with Jack and Optimum. I’m itching to get out inthe car and feel the speed!” added Marc Warren.

Marc and Jack’s step up into the GT3 class is the first of Optimum’s 2026 British GT entries to be announced.You can first see their new livery on track at the series’ Media Day on March 31st before the opening round at back at the Home of British Motorsport on April 26th.

#90 Silver-Am GT3 - Marc Warren and Jack Brown

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