Zaha Hadid has been picked to design London's landmark Olympic Aquatics Centre - the first venue to be unveiled as part of the capital's 2012 Olympic bid. The complex will offer two 50m competition pools, a diving area and seating for 20,000 spectators. Facilities are to be enclosed under an S-shaped roof that, according to Hadid, was inspired by water flow. To ensure its long-term use after the games, the pools have been designed for easy conversion into different spaces for community use. The centre will also feature a health and fitness suite to underpin its future viability.