I did manage to go today. It was a horrid day outside, rainy and no sun. I only saw one butterfly in flight!
There lots of Owls, Blue Morphos and 2 types of Swallowtails but none flying. They advertised around 10 other species but I think I was just too late.
I'd recommend going at least a week before their advertised closing day (today) as things did seem to be winding down.
One highlight was an exceptionally friendly robin on the way back to the car:
Cheers
Lee
To butterfly meadows, chalk downlands and leafy glades; to summers eternal.