London 2012: women's synchronised swimming duets

Spectators arrive at the Aquatics Centre for the preliminary round of the women's synchronised swimming duets Photograph: David Levene for the Guardian

The South Korean duet team practice their routine Photograph: David Levene for the Guardian

One last chance for rehearsals Photograph: David Levene for the Guardian

The Russian team, frontrunners in the event, practice their routine while wearing some typically emphatic make-up Photograph: David Levene for the Guardian

A photographer shoots the practice session from an underwater porthole Photograph: David Levene for the Guardian

British duo Olivia Federici and Jenna Randall are through to compete in Tuesday's final Photograph: David Levene for the Guardian

Two perfectly synchronised sets of toes emerge on the surface Photograph: David Levene for the Guardian

A photographer takes advantage of an underwater window Photograph: David Levene for the Guardian

The Spanish duo, Ballestero Carbonell and Andrea Fuentes Fache cross hands as they perform their routine during the preliminary round Photograph: David Levene for the Guardian

The Japanese duo, Yukiko Inui and Ou Liu, make some characteristically theatrical faces during their routine Photograph: David Levene for the Guardian

Two pairs of legs protude from the Aquatics Centre pool Photograph: David Levene for the Guardian

A judge passes her scoresheet to a steward to be logged with the event officials Photograph: David Levene for the Guardian

Eszter Czekus and Szofi Kiss of Hungary glide beneath the surface during their duet Photograph: David Levene for the Guardian

A duo strike an elegant tableau during their preliminary round performance Photograph: David Levene for the Guardian