Merchant seamen’s campaign medal records 1914-1918 : The National Archives, UK
You can search and download over 155,000 cards recording the award of campaign medals to merchant seamen in the First World War. These cards record the award of the British War Medal, Mercantile Marine Medal and Silver War Badge. The cards are from the catalogue references BT 351/1/1, BT 351/1/2 and MT 9/1404. The records were used to record the issue of medals to individual seamen. All recipients of Mercantile Marine Medals were automatically entitled to the British War Medal and the index additionally records its issue.