A couple of new links which may be of interest; http://www.bromleyfirstworldwar.org.uk/index.php
Thanks to Rosemary for this link; http://www.nursingtimes.net/5087956.article?WT.tsrc=email&WT.mc_id=Newsletter1
Still find this one of use to identifying wartime auxiliary hospitals;
http://www.redcross.org.uk/~/media/BritishRedCross/Documents/Who%20we%20are/History%20and%20archives/List%20of%20auxiliary%20hospitals%20in%20the%20UK%20during%20the%20First%20World%20War.pdf