As the sun was shinning this morning I decided on a Butterfly hunt, can not match your Green Hairstreak but had a good morning on the farm land around Porritt lodge.
Small White 3
Large White 1
Green Veined White 3
Peacock 5
Small Tortoiseshell 5
Speckled Wood 3
There were Orange Tips, male and female every where, difficult to count as it was quite windy but certainly 20+, they were all attracted to Cuckoo flower [cardamine pratensis] which has just flowered in the last few days, see attached.