Defending champion Matt Armstrong claimed all three Caterham Seven Championship UK victories at Knockhill, on the category’s latest appearance on the British Touring Car support bill, but it was far from plain sailing.

The Team Parker racer started a dry opener from pole position alongside Harry Senior, with points leader Taylor O’Flanagan nearly half a second behind in third. Armstrong and Senior quickly broke away from the pack and engaged in a race-long battle for the win, often at lap record pace. Although Senior applied severe pressure throughout, he was never quite close enough to mount a serious overtakin