In Bouldnor Forest there is a collection of scrape-like ponds which are a remnant of oil exploration.They have become home for several species of dragonfly and now a water source for butterflies in this prolonged dry spell.It is maybe not unusual to see butterflies at damp patches in order to access salts, but it is always good to see a species that is not easily seen on the ground.This Purple Hairstreak seems to be a regular visitor at this water source at present as one was seen at the same location a week ago.
The nearest oak trees are just a stones throw away,as can be noted in the photograph below.Other butterflies after moisture at the same time were a White Admiral and a Small White.