Divers Becky Gallantree and Hannah Starling have advanced to the semi-final of the women's three-metre springboard at the Aquatics Centre.
Gallantree failed to get past the preliminary round in Beijing four years ago but a score of 299.25 was enough to see her finish 16th and just inside the 18-diver cut.
Starling was fractionally behind her fellow Briton with a total of 298.95 placing her 17th.
The 17-year-old, the youngest diver in the competition, had been 19th heading into her final dive but drew scores of seven for her forwards two-and-a-half somersault with one twist to nudge through.
The City of Leeds duo will, however, have to improve to reach the final with the top 12 set to go through from Saturday's round.
World champion Wu Minxia qualified in top position with a score of 387.95 ahead of compatriot He Zi, who she won the springboard synchro alongside earlier this week, in second.
Starling had feared she might have missed out after her last dive. The teenager turned to the crowd and smiled as she swam back to poolside and revealed she had done so because she thought it would be her last chance to enjoy the support of 17,500 fans inside the Aquatics Centre.
"I just wanted to take in the feeling of the whole crowd because I thought it might be my last dive at the Olympics," she said. "I wanted to remember the moment so I turned around and looked at it all. It was brilliant. I was just so happy and at that time I didn't know if I was through."
Gallantree was also pleased to go through after failing to progress beyond the first round at the last Olympics and world championships. The 27-year-old was always inside the top-18 today and, after reaching the final at the World Cup at the Aquatics Centre in February, has the potential to win through tomorrow.
"It feels great. I'm really, really happy to be through to the semi-final and hopefully I can make some improvements for the semi-final and I can go out there and enjoy it again," she said. "Absolutely we managed quite good scores but there is room for improvement. We know what we need to do to improve on it."