Siobhan-Marie O'Connor claimed the first international medal of her senior career at the European Short-Course Championships in Chartres.
Just five days before turning 17, O'Connor lowered her personal best in the 100 metres individual medley for the third time in three races and a time of 59.72 seconds helped clinch a bronze medal, with her British team-mate Sophie Smith finishing fifth.
"I'm really happy because I didn't expect to come here and medal," said O'Connor, who won the British team's fourth medal of the competition.
"I've been putting really hard work in training so to come away with a medal and my first senior medal, I'm over the moon.
"Obviously I was going in ranked third so I knew I had a chance but anything can happen in a race.
"I was a bit nervous because that was only my second senior final but I just pushed hard and managed to go a bit faster than the semis."