2012 Olympic landscape showing Aquatics centre by Pritzker prize winner Zaha Hadid and main stadium at Stratford. The London Aquatics Centre has 2 50m swimming pools and a 25m diving pool. Built by Balfour Beatty for £242, three times the original cost. The aluminium roof is provided by Kalzip with cooperation from Rowecord Engineering and is 1,040 sq metre, weighing 3,200 tonnes.