Prepare to swing your hips, move those feet and feel the heat. Once a year, the best ballroom and Latin dancers from across the globe quickstep their way to Blackpool to take part in dancing's most prestigious competition, the British Open Championships. For nearly 100 years, it has been one of Britain’s best-kept secrets, but this year we are invited to join in and tell the behind-the-scenes story of the Latin and ballroom dance scene in Blackpool - waltz and all…