 During World War II the Blyth company built five and two s, seven s, as well as two s and ten s. The former German cargo ship "Hannover" was also converted into the escort carrier .Hansard records on 8 December 1943 that a question was put to the First Lord of the Admiralty that a director of Blyth Shipyard and an Admiralty official, was convicted of fraudulently altering a tender to the extent of £12,000 enabling the shipyard to secure a contract.By 1947 the company was owned by Mollers (Hong Kong) Ltd.