I'm guessing WWI uniform for the first picture - or at least not much earlier, because I think the woman's wearing a wristwatch, which apparently weren't popular until the 1920s? Cf this chap perhaps, in a very general way - the pocketing and similar braid through his epaulette... Hmmn - the IWM site suggests that it may have been a lanyard, which were worn by officers, and because it's khaki coloured rather than white (as in the other picture, I think), it suggests he was on active service... I think he looks like he's wearing puttees, which were apparently worn from the early 1900s..? But I'm afraid I'm making it all up from random googling tonight, just cos your pictures got me curious! *g* His collar's interesting too - scroll down this forum and a woman was wondering about a similar-looking collar on a c1916 photo...