3rd wedding

This image was taken from my third and last wedding. I was using a Sony A6000 with sigma 19mm 2.8 lens. The wedding was in a golf club in Swansea and this shit was taken on the mound of a sand bunker. I was kneeling in the wet sand in almost pitch black and only one flash Godox tt600. I was hoping for a better sunset but there were too many distractions to post out so made the most of what I had. This is by far one of my best shots.
I would love your critique on this.