Ellie Simmonds broke her own world record to secure her second gold medal of London 2012 in the SM6 200 metres individual medley.
The 17-year-old produced a blistering freestyle leg to go past Oksana Kruhl to win in three minutes 5.39 seconds - beating the record she set this morning by 0.75secs.
A delighted Simmonds told Channel 4:
It was Simmonds' second gold of the week having won the S6 400m freestyle on Saturday. The swimmer is still set to compete in the 50m and 100m freestyle events.
Great Britain's Natalie Jones took bronze in the 200m individual medley recording a time of 3mins 14.29secs.
It has been a successful night in the aquatics centre for Great Britain, with Sascha Kindred winning silver in the S6 200 metres individual medley.
The 34-year-old went under the world record but still finished second, narrowly behind China's Xu Qing.
He told Channel 4:
Susannah Rodgers also won a medal for Britain, winning bronze in the women's100m freestyle S7.