In 2004, Pistorius took his first gold at the Athens Paralympics and one year later competed against able-bodied Olympics for the first time, at the South African Championships.

CNN: Who is 'Blade Runner' Oscar Pistorius?

In his first year he was already running the 100m quicker than the existing Paralympic world record, and in 2004 he came to prominence by winning gold at the Athens Paralympics in a new best time.

CNN: Oscar Pistorius: The bullet in the chamber

Roberts, who won three golds at the 2000 Sydney Paralympics and four at the 2004 Athens Games, was diagnosed with cerebral palsy at the age of 11 and was told swimming was the best form of physiotherapy.

BBC: Profile: David Roberts

"I think the experience I have gained from the previous Games will help this year, " said Kindred, who won gold in the SM6 200 IM and SB7 100m breaststroke in Athens and who will be appearing in his fourth Paralympics in Beijing.

BBC: GB name Paralympic swimming squad