England need to find the right T20 formula, says Giles

England's coach Ashley Giles reacts after England lost the first One-Day International against the West Indies at North Sound in Antigua February 28, 2014. REUTERS/Philip Brown

(Reuters) - England limited-overs coach Ashley Giles is searching for the right "formula" ahead of the Twenty20 World Cup in Bangladesh after his side suffered a series defeat against the West Indies.

England have been below par during the three-match Twenty20 series in the Caribbean, with the West Indies comfortably wrapping things up after victories in the first two games.