Nice pose and a pretty lady. Needs more contrast though with some shadows.
George

This looks very well done to me Iain. The likes of Rolando Gomez will often cut elbows off and I think the close crop with the high key background helps avoid too much bright white in the frame. Importantly, Jen's stance provides a good S-curve and both models are very fit. One tip I have read is that the hands placed flat on the hip to enhance the curve is preferred. I think that if Debbie had her right knee bent her hip could have been a little forward and matched Jen's pose also. These comments are just what I have read lately so I am no expert but overall, this is a good glamour shot imo.
George

Beautiful subject and nice focus on the water drops and near petals. Nice thing about flowers, they usually hold still and don't ask for diamond rings. You may want to experiment with smaller aperatures to increase depth of field..