Roberts is the world record holder in the S7 100m freestyle

Dave Roberts got the better of British team-mate Matt Walker to win gold in the S7 100m freestyle at the IPC World Swimming Championships in Durban.

Paralympic champion and defending world champion Roberts kept his form to win in one minute 02.13 seconds.

Walker was beaten into bronze position by America's Lantz Lamback with another Briton Andrew Lindsay in sixth.

Natalie Jones won silver in the S6 100m freestyle while there were bronzes for James Crisp and Rachael Latham.

"It was important for me to come here and win," said Roberts. "It's not been the greatest of years for me with injury and illness so it was good to finish on top.

"I'm slightly disappointed with my time, which is odd to say when I've just been crowned champion, but it shows the standards we're aiming at with this team.

"I knew I was able to win and I wanted to lower my world record, but the important thing about the world championships is to come first and I managed that."

Jones broke a six-year British record in her event, setting a new best of 1:21.59 behind Dormitzi Gonzalez of Mexico who was first in 1:21.34.

That was a terrible performance and I'm really disappointed with myself James Crisp

"I'm so pleased to have medalled in this event," said Jones. "I would have liked the gold, but it was always going to be a tough task so I'm really happy.

In the same event, 12-year-old Eleanor Simmonds, the youngest athlete ever to be part of a senior British swimming squad, reached the final and finished seventh in a personal best time of 1:27.64.

Crisp had to settle for bronze in his number one event, the S9 100m backstroke, and also lost his world record.

America's Jarrett Perry took the record, lowering it to 1:03.91, with Australian Matt Cowdrey taking silver while Crisp's fellow Briton David Hill just missed out on the medals in fourth.

There was a surprise bronze for Latham in the S8 100m butterfly after China's Shengnan Jiang was disqualified.