The Picture She Took by Fiona Shaw
It's set just after the First World War and concerns an ex-Nurse who took photos, and a veteran who was posted in Ireland. Don't know much more yet, as I haven't got that far! I'm reviewing it for the Historical Novel Society. The author is local to me (lives near York), and her previous book did quite well; it was historical too.
Meanwhile over at Blue Remembered Blogspot, I've posted the final part of Charles Evans-Gunther's Rosemary Sutcliff article.