The reigning British GT4 champions Jack Brown and Marc Warren will graduate to the championship’s top class in 2026 aboard an Optimum Motorsport McLaren 720S.  <br>This will be both of their debuts in British GT’s GT3 category, competing as a Silver-Am entry alongside the squad they clinched last year’s GT4 title with at the Donington Park finale. <br>It came after a year-long battle with ...<a class='more' href='https://www.autosport.com/BGT/news/british-gt4-champions-graduate-to-top-class-with-optimum-mclaren-for-2026/10789924/?utm_source=RSS&utm_medium=referral&utm_campaign=RSS-ALL&utm_term=News&utm_content=uk'>Keep reading</a>