Great Britain’s women were beaten as Australia broke the world record by nearly three seconds in the Track World Championships team pursuit final.
They denied Katie Archibald, Elinor Barker, Laura Trott and Joanna Rowsell a fifth straight gold and inflicted on them their first defeat in four years.
Australia won gold with a blistering time of four minutes 13.683 seconds.
The GB men’s pursuit team also had to settle for silver after a desperately close battle with New Zealand.
Ed Clancy, Steven Burke, Andy Tennant and Owain Doull clocked an impressive time of 3:54.687 in a final in which they had opened up a lead of more than half a second.
However, a final-lap surge from New Zealand saw them edge back ahead to take the gold in a time of 3:54.088 and deny Britain a first gold in the event since 2012.
But the performance of the evening came from Australia’s women Annette Edmondson, Ashlee Ankudinoff, Amy Cure and Melissa Hoskins as they demolished Britain’s previous world record of 4:16.552.
“I’m a bit gutted, I guess,” said Trott, who had previously always taken gold in the event since her Track World Championships debut in 2011.
“It’s the first one we’ve lost so a bit of a shock but they rode a 4:13 which is unbelievable. We’ve never gone anywhere near doing that so hats off to them.
“It’s disappointing. We are used to being on the top step so it was a different feeling. But we rode a PB, quicker than we’ve ever been before at sea level, and for us that is a massive step. It also shows we have work to do.”
Earlier Britain’s Jason Kenny, the 2013 world champion, failed to qualify in the men’s keirin.
“I was just a spectator and never really got involved in the race,” he said.