The English navy was ably assisted by their allies, principally Flemings from Sluys and nearby Bruges who watched the fight from the shore and kept any French sailors from escaping.
Edward III attempted to capitalize on the victory with a Battle of Saint-Omer, which resulted in a resounding defeat for the 11–16,000 strong English and Flemings army at the hands of some 3000 French men-at-arms.
The subsequent siege of the town of Tournai, equally ended in a failure for the Anglo-Flemish besiegers, despite all their attempts to dislodge a heavily outnumbered and outsupplied French garrison.
[1][2] Following major setbacks at Saint-Omer and Tournai, Edward's ability to continue the siege and campaign in France came to an abrupt end.
The defeats sustained by the Anglo-Flemish armies resulted in bickering within his alliance but also in his own parliament withholding much-needed funds to enable him to continue the war.