One of the most iconic British films of all-time struggled to raise its tiny £2.8m budget yet took $1.2 billion dollars (£900m) at the box office. 'Billy Elliot' has just celebrated its 25th anniversary with yet another stage version of the show about to open in South Korea. For Geordie-born writer Lee Hall, it was his first major screenplay and told the story of the 11-year-old boy from a County Durham coal-mining family who discovers a passion for ballet. Yet the makers of the hit movie,