The National Archives
Key personal information is often found in individual service records and medal card indexes held at the National Archives. These can be downloaded (for a fee) or you can view them for free by visiting the National Archives at Kew. War diaries and logs of units in which individuals served are also held at the National Archives and provide more general information about individuals. You can determine an individual's unit through medical records cards, or, if they died, via the Commonwealth Graves Commission (see below). www.nationalarchives.gov.uk
Commonwealth War Graves Commission
If an individual died during the conflict, or its immediate aftermath, you might find them on the Commonwealth War Graves Commission's free-to-use online register. www.CWGC.org
Lives of the First World War
This online project by the Imperial War Museum brings together material from museums, libraries, archives and family collections from across the world. You can help explore these documents, link them together and start telling the stories of those who served in uniform and worked on the home front. www.livesofthefirstworldwar.org
Ancestry
The Ancestry website is useful for accessing family history records. Most UK local authority library services now subscribe to Ancestry and so you may well be able to access it for free in your local library. www.ancestry.co.uk
A photograph of a British soldier and his wife and five-month-old baby. http://www.europeana1914-1918.eu/en/contributions/15474#prettyPhoto
