Radio Times: Review by:; Steve Trew

Keri-Anne Payne won silver for Britain in the 10km women's marathon in Beijing, and since then she has won the world championships, too. Now she will be swimming in the cooler waters of the Serpentine.

The open water swim is a bit like the Tour de France. You try to get directly behind someone’s feet, or next to their hip, and get swept along in their slipstream, using less energy yourself. But Keri-Anne is very confident, and she likes leading from the front. She is the one to beat, and the other swimmers will be very aware of her abilities this time round.

If all goes well, 2012 could be a very good year for Payne – she is marrying fellow Team GB swimmer David Carry in September.

About this programme

The women's 10km open-water swimming marathon. Matt Baker and Clare Balding present coverage of the race from the Serpentine in Hyde Park, which begins at 12.00. The entrants swim six laps of the course as they aim to win gold, with Britain's Keri-Anne Payne among the favourites, having finished second four years ago in Beijing, where the event made its Olympic debut. With commentary by Andy Jameson and Adrian Moorhouse.