British Army WW1 Service Records

Ancestry.co.uk have updated there collection to now include all 1.9 million records for non-commissioned officers and other ranks who served in the British Army in WWI. The records are fully name indexed.

For viewing for free from Family History Centres FamilySearch has recently placed online 19,206,333 images from the same source, the National Archives: WO 363 (War Office: Soldiers' Documents, First World War "Burnt Documents") and WO 364 (War Office: Documents from Pension Claims, First World War). They are sorted by surname range.