Having seen the bird of a few years ago actively feeding along the north east shoreline, I made a B-line for the car park there. A thorough scan of the water revealed the bird actively feeding on crayfish right in front of the shoreline where Dan and I watched the last bird, i.e. the north west.
Anyway, I offered my phone up to my scope and grabbed a few shots. Not up to Grouse standards I'm afraid.
After a while I moved drove across to the other side of the reservoir, to find the diver relocated to where I'd come from and then move to the south of the reservoir. It's very active. A Harris's Hawk put in a brief appearance too, much to the annoyance of the local crows.