90,000 volunteers worked at home and abroad during World War One. They provided vital aid to naval and military forces, caring for sick and wounded sailors and soldiers.
The pictures below show some of these First World War Red Cross volunteers, but their identities are a mystery. Do you recognise anyone?
Members of the VAD on a motorbike and sidecar at Southmead Hospital, Bristol.
VAD nurses with wounded soldiers in the garden at Southmead Hospital, Bristol
Nurses and patients on a ward in Burton-on-Trent town hall auxiliary hospital, Staffordshire.
Two unidentified members of the Voluntary Aid Detachment at Southmead, Bristol.
Nurses playing cards outside Cheadle Hulme Red Cross hospital, Cheshire.
Fundraising collection by members of the Sussex/80 Voluntary Aid Detachment.
Lone soldier at an unknown location.