Just been looking at some IWM photos from Normandy in '44. Generally how reliable is the recorded date that a photo was taken? Where there's a sequence all with the same date, for example, does that mean they were literally taken on the same day? Or is it approximate, e.g. more like a "finished that story" date? I'm thinking particularly of photos at the sharp end of events rather than some of the more obviously posed "behind the lines" examples.