The following is compiled from an announcement by findmypast.co.uk
Royal Navy Officers Medal Roll 1914-1920 records comprise a transcript of the complete WWI Campaign Medal Rolls to 53,000 officers of all branches of the Royal Navy taken from The National Archives document classes ADM/171/89 to ADM/171/93 (inclusive) and ADM/171/139
Added to the transcript are service details for a large number of officers, particularly those killed in action or died of wounds during WWI. In many cases, post-war deaths and WWII deaths are noted.
The medals that the rolls cover are: The 1914 Star, the Clasp to the 1914 Star, the 1914-15 Star, the British War Medal and the Victory Medal.