These are freshwater lakes, adjacent to the coast in South Pembrokeshire. They're renowned for the lilies which grow in abundance here. It's where I took the photo of the white lilies which I posted a couple of days ago https://365project.org/susiemc/365/2017-05-15
It was a very dull damp day.
Nicely framed, light certainly gave you a challenge in getting exposure/contrast right, (are you still shooting auto mode or did your course convince you to take control???)