Euclidian staff were the victims of a cheeky theft at the Lloyd's Yacht Club Lutine Lineslip Regatta last month.
The Lloyd's company tied a pair of Union Jack knickers to the halyard of their boat in honour of England's victory against Germany in the World Cup qualifers.
But during the night, sailing rival Hill Dickinson crept onto the boat and stole the G-string. After the final race the next day, a team member revealed he was wearing the underwear.
Euclidian lawyer Kees van der Klugt said the snatching of the thong was appropriate. "They had, after all, seen only our backside during the racing."