Gurinder Chadha's 'Bend it Like Beckham' is the highest-grossing sports film to focus on football, telling the story of a British-Indian teenager who falls in love with the game, while exploring themes of immigration, race, religion and sexuality. 20 years on from its release, BBC Sport's Miriam Walker-Khan looks at the impact the film had on audiences, its legacy in the world of sport and how its humour and characters still make it relatable today.