GB started the race with a guaranteed silver medal as they and New Zealand shared top spot with 33 points. The home team got off to a great start but were undone by a big wind shift on the opposite side of the course in the first leg and finished the medal race next to last.
The Kiwis finished first and took the gold medal, with the Netherlands collecting the bronze.
The British pair couldn't hide their disappointment at the end with Clark, who finished sixth in Beijing, saying afterwards: "We just feel a bit gutted at the moment that we didn't put in a big show."
Available to UK users only.