Medal commemorating minesweepers and patrol vessels

Medal commemorating minesweepers and patrol vessels. Obverse: Britannia standing on a rock in the sea, her shield behind her, spearing with her trident one of the several sea monsters around her. Inscription: 'VIVAT BRITANNIA'. Reverse: Port-bow view of a steam trawler, the admiralty shield below and a ribbon, inscribed, 'ENDVRANCE VALOVR'. Legend: 'TO . THE . FISHERMAN . DEFENDERS' (in the field) 'OF OVR COASTS'.