Who are you, I wonder

Stopped off at my Dad & M's on way down to Edinburgh. My uncle had sent him a wonderful small book of photos of my grandparents when they were engaged. Tucked away was this photo - presumably of some relation. She looks interesting but have no idea who she is -  time for some family tree sleuthing. 

Now in Edinburgh and catching breath before heading out to HazelH & Mr HazelH's for a night of merriment.