Olympic medallist Mallory Franklin marked her return from having a daughter with canoe gold and kayak cross silver at the Paddle Europe Slalom Championships in Ivrea.
Chantelle Reid, Abdul Burton and Damar Thomas were each beaten in their finals but secured silver medals for Britain.
Burton advances to the men's super-bantamweight final while Callum Makin and Dimeji Shittu secure bronze medals at the European Championships.
The featherweight boxer will return from Bulgaria with a bronze medal after losing her semi-final bout.
Chantelle Reid and Damar Thomas will fight for gold after semi-final wins on Wednesday.
Great Britain has secured at least three medals at the European Boxing Championships in Bulgaria after Chantelle Reid, Damar Thomas and Abdul Burton all advanced to the semi-finals.