Still not 100% happy with my attempts at using preset lighting so had a play around with the Environment settings to create bright summer sunlight, then used a single spotlight to brighten up the face and add a catch light in the eyes.
Odd shadow under her right breast is (I think) from a building which I can't delete from the scene.
The render left the pavement (sidewalk if your on the other side of the Pond) completely bleached out but I was amazed at how much detail I could recover using Photoshops Highlight and Shadows tool.
Model is Gen8 Georgina, preset post with a few tweaks to the hands and to raise her right leg.