More than 10 million litres of water are being used to test the three concrete pools at the London 2012 Aquatics Centre, which remains on track for completion in 2011.

Testing of the dive pool and training pool has been completed, with the competition pool due to be filled before work starts to seal and line the pools with 180,000 tiles. Olympic Delivery Authority chief executive David Higgins said: "The Aquatics Centre is on track for completion in mid-2011 and the sweeping roof that will form the 'Gateway to the Games' is now a fixture in the skyline alongside the Olympic Stadium.

"Testing the pools is major milestone for the construction of the Aquatics Centre which in legacy will provide a range of swimming and diving facilities and become a new London landmark." Architect Zaha Hadid is behind the design of the Aquatics Centre, which will boast two 50m swimming pools with moveable floors, a diving pool and a dry diving area for use during the 2012 Games and community use in legacy mode.

Image: ODA/David Poultney