There will be British representation in an Olympic synchronised swimming final for the first time in 20 years after Jenna Randall and Olivia Federici qualified in ninth for the duet, as Russia close in on their fourth consecutive gold.
In Beijing, the pair had been the first Britons to compete at a Games since 1992 where they finished 14th.
In the intervening four years, the pair have made huge strides on the world stage, including a Commonwealth silver medal together, and now they will be the first British synchronettes in an Olympic final since 1992 when Kerry Shacklock and Laila Vakil finished sixth.
The free routine is marked on artistic impression and technical merit, with a maximum mark of 50 points for each. These are then combined and added to the result of Sunday's technical routine, with the top 12 of the 24 pairs going through.
Randall and Federici - who both train at the high performance centre in Aldershot - had improved by one their 10th-placed finish at last year's World Championships in the technical routine.
On Monday, their London-themed free routine portraying the ravens at the Tower of London set to a Chemical Brothers soundtrack was scored 88.790 points, placing them ninth, one down on eighth in Shanghai last summer.
When combined with their technical result on Sunday the pair went through with 176.890pts, and insisted they had plenty to work on before the final.
Randall said: "We've got a few things to improve on for tomorrow, it wasn't one of our best so we are hoping to get the things fixed we need to get fixed and make an improvement.
"With the technical aspect of our routine, there were a few things that were slightly off, we weren't exactly the same so just to try and make that perfect tomorrow."
Federici echoed her team-mate's sentiments, saying: "We want to go back home, look at the video, see what we can do so when we get back in the pool and train tomorrow, and really make it a perfect swim so we give our best performance. This is our London 2012 Games so we want to give it everything we've got and do our best performance of the year."