By James Toney, PA Sport, Sydney

Iain Percy and Ben Ainslie continue to lead the way at the Olympic Regatta after another day's high seas drama in Sydney.

The British pair maintained their golden pole positions, in the Finn and Laser classes respectively, despite changeable wind and lumpy swells in Rushcutter's Bay.

Scotland's Shirley Robertson lost control of the gold leader's jersey she has worn since day one, dropping down to second overall in the women's Europe rankings.

Robertson has three remaining races on Thursday and Friday and is just one point behind new leader, Argentina's Serena Amato.

Despite a mid-fleet position, Ainslie increased his lead in the Laser to 14 points with four races remaining while Percy has a narrow five-point advantage with five races still to come.

"I'm just going to keep open-minded over the next few days as anything can and usually does happen in Sydney Harbour," said Ainslie.

"I'm expecting things will close up and the current standings could change dramatically in the last four races.

"Overall, the best aspect of the day was that some of the others had really bad ones.

"An 11th wasn't so bad considering what happened to me during the race and how some of the others finished."

Percy, ranked ninth in the world before the Olympic regatta, continues to keep a level head despite leading the Finn fleet from the opening day.

"It was a bit of disappointing day but the overall situation still looks OK. I'm just trying to stay focused and concentrate on race to race. I've only raced half a regatta so far."

On Wednesday, Nick Rogers and Joe Glanfield will aim to follow in the wake of 49er pair Ian Barker and Simon Hiscocks and bank Britain's second sailing medal at the Games.

They enjoyed a rest day in Sydney today but still moved up one place in the overall rankings to fourth, after race organisers disqualified Ukrainian reigning Olympic champions Evhen Braslavets and Igor Matvienko from Monday's penultimate race.

The British duo must finish five places ahead of Brazilians Javier Conte and Juan de la Fuente to bank bronze in the final fleet race of the series.