I've only been able to get down once this week, this evening, and I was very pleased to find 6 birds on the overflow again. I managed to get some better photos of the 6 birds, and a nice portrait shot of one on its own. 6 had increased to 8 by the time I left, but it was too dark to get a photo by then!
Whilst walking back to the car I heard a Kingfisher calling and also heard a Tawny Owl just below the car park. The weather forecast isn't great for the weekend, but I'll try to get down again and get a shot of all 8 birds together.