The British showjumping team, which included Scott Brash, from the Borders town of Peebles, leapt to a glorious gold in a nail-biting jump-off and there was more British success as cyclist Jason Kenny stormed to victory in the men's sprint.
The 2008 Beijing Games brought Britain's best Olympic haul in 100 years with 47 medals – 19 gold. But with nearly a week to go Team GB has already secured 40 medals – 18 gold, 11 silver and 11 bronze, leaving it in third place in the medal table behind China and the US.
The victory for Nick Skelton, Ben Maher, Scott Brash, and Peter Charles was Britain's first team showjumping gold in the event for 60 years.
Veteran rider Skelton said winning in front of a packed crowd in Greenwich was "a dream come true".
"It's great for the country and great for our sport," he said.
Skelton, 54, who rode a flawless round in the jump-off, won despite having a hip replacement last year. He said: "My hip's great, it's my back that's the problem now, I've to have it operated on next year."
He and Peter Charles, 52, have also both suffered broken necks in the past.
Scott Brash, 26, said of Skelton and Charles: "I've learned so much from them. When Nick's first to go, you expect him to jump clear. That's a great thing to have someone like that and Pete's unbelievable under pressure."
Brash will join the elite gold post box club as the Royal Mail will paint a traditional red postbox gold in his honour this morning in Peebles High Street.
The win for 24-year-old Kenny, who was selected for the event over Sir Chris Hoy, has now won two golds in the London Games to add to one in Beijing.
It was Britain's fifth gold from seven velodrome events, with more success possible when Victoria Pendleton and Laura Trott ride for glory.
Kenny, from Bolton, said: "It's amazing. I was really pleased I delivered for the team."
Earlier gymnast Beth Tweddle, won her first Olympic medal, a bronze in the uneven bars. Tweddle, who for many years has been an ambassador for British gymnastics, was delighted.
The 27-year-old, from Liverpool, said: "It means everything. I just wanted to win a medal, it didn't matter what colour. It's the best feeling in the world."
Elsewhere, Helens-burgh's Luke Patience and Stuart Bithell continued their crusade for Olympic debut gold after another impressive display on day nine of the London 2012 sailing regatta.
The pair picked up their second race win before scoring a sixth place to sit just one point behind the Australian leading team of Mathew Belcher and Malcolm Page, with two series races and the final double points' medal race to come on Thursday.
The two leading teams have extended their advantage over Italians Gabrio Zandonã and Pietro Zucchetti in third.
Patience said: "We are still keeping it grounded.
"First and foremost we have to go out and do exactly what we have done every single day and just try to get that first result in the bag and then we can maybe think a bit about something attacking.
"But, first and foremost, get the result first."
The 470 Men are scheduled to resume at noon today on the Portland Harbour course.
The Duchess of Cambridge continued her Olympic support when she watched some of the sailing and met the British team.
Kate was on the water for the Laser Radial medal race, where Ireland's Annalise Murphy narrowly missed out on a medal.
She was joined by the Princess Royal and Sir Steve Redgrave, with the latter accompanying her to meet some of Team GB's sailors.
Kate met Ben Ainslie, fresh from winning a record-breaking fourth gold medal on Sunday, as well as Paul Goodison, Annie Lush, Luke Patience, Stuart Bithell and Nick Dempsey.
