When I eventually reached the lake it was quite good.
Lots of Common Blue Damselflies, an Azure Damselfly, several Four-spotted Chasers, a couple of Black-tailed Skimmers, a couple of Emperors, a few Large Red Damselflies and species of the day 3 Brilliant Emeralds.
There was a darter sp. on the way back to the car but it flew away before I could ID it.
There was a female Mandarin with 5 ducklings on the lake
BTW: There is a film crew here - I understand its for the new Harry Potter movie