10 June 2014 Last updated at 15:11

America's Cup: Ben Ainslie announces British entry into Cup

Four-time Olympic gold medallist Sir Ben Ainslie was joined by the Duchess of Cambridge to launch Britain's bid to win the 35th America's Cup.

Ainslie won the race last year with Oracle Team USA, helping to turn an 8-1 deficit into a 9-8 win against Team New Zealand in one of the greatest comebacks in sailing history.

The historic race first took place off the Isle of Wight in England in 1851 but a British team has never won it, and Ainslie hopes to skipper a first victory in the next event in 2017.