Full highlights from the Men's 4 x 200m Freestyle Relay Final in which Michael Phelps win's his record breaking 19th Olympic Medal as the USA secure Gold at the Aquatics Centre in London.

Swimming has featured on the programme of all editions of the Games since 1896. The very first Olympic events were freestyle (crawl) or breaststroke. Backstroke was added in 1904.

In the 1940s, breaststrokers discovered that they could go faster by bringing both arms forward over their heads. This p