A UK company's offshore support vessel (OSV) will soon be heading out to sea to bring back the first batch of lost wartime gold and silver cargoes worth $750m.

Britannia's Gold (BGL) used a chartered-in research ship, Ostensjo Rederi's 2,800-dwt Edda Fonn (built 2003), during April to survey seven known World War I and World War II wreck sites off Northern Ireland and the south and west of the Republic of Ireland.