Dennis completed a grand slam in the Saturday race in London's east end, leading every lap from pole and securing a victory with a 2.2s margin over title leader Vandoorne - taking a fastest lap in the process.
It was the Warwickshire driver's first win since last year's race in London, but due to COVID last year's races did not have a full crowd in attendance - and Dennis was cheered throughout the race as the fans pulled for a home win.
