The image above is of the painting "A Summer Night" (1923) by Stanley Cursiter (1887-1976) featuring Poppy Low. Cursiter was from the Orkneys, but spent most of his career in Edinburgh where, among other things, he was Director of the National Galleries of Scotland. During the Great War he devised a new means of interpreting aerial reconnaissance photographs. He was also a champion of modernist art and some of his paintings were in that mode both early and late in his career, though they were not very good in my judgment.
Biographical information on Cursiter can be found here, here, and here, but some important details vary.
Beside dabbling in modernism, Cursiter also painted landscapes, particularly of Orkney scenes. Where he excelled was portraiture. Besides the usual mix of politicians and military officers, he painted some interesting works featuring family and friends. One of those friends was Poppy Low, who seemed to be somewhere around 16-22 years old when Cursiter was using her as a favorite model. Several of those paintings were group portraits that included his attractive wife Phyllis and his sister.
The images below are copyrighted by his estate, but I hope the estate will not mind the publicity this post will provide Cursiter. Not every painting featuring Poppy is presented here. And it's possible that some of the young women who I thought were Poppy were actually someone else. (For instance, there's a portrait of "Roberta" that looks like Poppy. But might Poppy's actual name have been Roberta?) I should add that so far I have found no details regarding her life.
That would be Poppy on the right.
An early paining featuring Poppy.
I think that's Poppy in the background.
I'm not so sure about this, though one source I skimmed stated the she was used for this painting.