Harriet Pryke was in action in Oordegem in Belgium on Saturday evening at the International Flanders Athletics meeting.
The Martin Bullock-sponsored athlete ran the 400m B race and won in 54.81 against athletes from Belgium, France, the Netherlands and Ireland.
The IOM Sport Aid-recipient will be competing again this coming weekend in Birmingham at the England Senior Track and Field Championships, which this year also incorporates the North of England Championships.
Commonwealth Games athletics squad in positive mood ahead of Glasgow
Five competitors - including three debutants - set to be involved
FC Isle of Man get pre-season underway with summer festival
Ravens get first runout ahead of new season
Swimming: Oscar Maddrell becomes triple British champion
Manx swimmer also breaks Island records during successful trip
Football: Mixed results for IoM Women in summer series
They welcomed Ynys Mon to The Bowl last weekend