Members of the women's army - Women's Army Auxiliary Corps and later Queen Mary's Army Auxiliary Corps were not nurses, nor did they work directly in hospitals. They were employed in army camps to take over jobs previously done by men, to release them for military service, so clerks, orderlies, storewomen, drivers, waitresses, telephonists, cooks - anything that needed doing.
Most of their service records were later destroyed, and only a small percentage (about 10%) have survived. Those are at The National Archives in Class WO398 and can be searched online and downloaded for a fee if you're lucky enough to find who you're looking for:
http://www.nationalarchives.gov.uk/records/womens-army-auxiliary-corps.htmIn addition, quite a few members were later transferred to the Women's Royal Air Force, and there is also a run of records for them in class AIR80, though the information in those is quite brief:
http://www.nationalarchives.gov.uk/records/airwomen-ww1.htmOther than that, there are no service records and little chance of finding official mention of the women. However, the Imperial War Museum have an extensive and fully-searchable range of documents relating to the WAAC/QMAAC within its 'Women's Work Collection.' It's held online at the IWM, and can be accessed via their computer terminals there. Not sure now it's been re-hashed if things are the same, but before the closure you could just walk in any time and find a spare computer on the first floor and sit there for as long as you like. The documents are mainly organisational and administrative records, but some are very informative and interesting to help get some idea of what life was like in France. It's also worth checking out the photographic collection which can be accessed online - just be inventive with the keywords you use for a search and you'll find a fascinating collection of images.
http://www.iwm.org.uk/collections/searchIf you put something like 'WAAC' in the box, and when you get the results up use the filters on the left - e.g. click on 'subject period' and then 'First World War' etc.
Sue