Nice article, one thing I note is that the article focuses on Britain only although it has a very general title. (I am just noting, because even today most countries seem to have "surplus women"[1], so there is surely more to a topic with this title both in the context of other countries fighting in WWI and as general demographic trends.)
[1] http://en.wikipedia.org/wiki/File:Sex_ratio_total_population.PNG; on a global level it is still 101 males/100 females, according to Wikipedia
Best regards, Bence