Complex sentence: Both endured a poor weekend at Silverstone meaning the title would be decided at Brands Hatch a fortnight later; with Rivett retiring in the first race, Goff took the title in the second race of the weekend by nine points.
Split into simpler sentences: Both endured a poor weekend at Silverstone meaning the title would be decided at Brands Hatch a fortnight later. With Rivett retiring in the first race, Goff took the title in the second race of the weekend by nine points.