Great Britain's 10-strong team won bronze in the Team Free Combination event at the LEN European Champions Cup in Sheffield on Sunday.
Ukraine won the gold medal with an entertaining four-minute routine which scored 93.440, ahead of Italy (91.770).
GB's third-place finish means a British team have secured a European medal for the first time since 1994.
The British Synchro team were thrilled with their third place for their dolls-inspired routine.
GB's Lauren Smith said: "That is our best event and we wanted to really go for it. We got bronze at the German Open and we wanted to do it here in front of a home town.
"The crowd has been phenomenal again and we have just loved having that many people here.
"We have a hard highlight and we wanted to perfect it so we've worked on it lots. It is a very individual lift and it stands out which is the aim."
The current Olympic and World champions Natalia Ischenko and Svetlana Romashina showed their dominance in the duet with a performance that had the crowd on their feet and earned them a record score of 98.750.
Spanish pair Ona Carbonell and Andrea Fuentes scored 96.340 to finish in second spot, with Ukraine in third and Italy fourth.
GB's Allison was satisfied with their fifth place and said: "That felt much better than the prelim swim.
"We went into the final focused on the little synchronisation errors and watching it back on the big screen as we got out I could see that we managed to correct them. We scored better than in the prelims too which is always a focus when you go into a competition."