Brian tells us:
At Durlston on Saturday 7th July we came across this very strange Small Skipper. It looked whiteish in flight – quite different from the other Skippers, and really stood out when it was settled with its brilliant white patches.
Sometimes butterflies do not show the usual markings of the species, and these are known as aberrations. Photos of known aberrations can be found on http://www.ukbutterflies.co.uk