Fish Tank is a 2009 British drama film written and directed by Andrea Arnold. The film won the Jury Prize at the 2009 Cannes Film Festival. It also won the 2010 BAFTA for Best British Film. It was filmed in the Mardyke Estate in Havering, the town of Tilbury, and the A13, and funded by BBC Films and the UK Film Council.Mia Williams is a volatile and socially isolated 15-year-old. She lives on an East London council estate with her single mother, Joanne, and younger sister, Tyler, and is highly antagonistic toward both of them. Mia is a loner, appearing to have had a falling out with her best friend Keely. She provokes Keely's other friends and head butts another girl when Mia criticizes their dance routine. Mia regularly practises hip-hop dance alone in a deserted flat. Near the estate, Mia comes across a skinny, tethered horse in a traveller encampment. She tries to free it, only to be caught, taunted, and assaulted by two young men, the horse's owners. A third young man, Billy, the brother of the other two, is more sympathetic. He explains that the horse is ill and he befriends Mia.