Confidence: It's likely to be this, but I can't be certain.
Notes: Very worn specimen so difficult for my limited knowledge. I saw a similar specimen in exactly the same place 5 days ago which may have been this one as there was only a single individual on both occasions. I didn't get as good a view as this but had assumed Large skipper because the sex brand appeared more prominent and I thought it was late for Small. This one looks more like small to me. As far as I know Essex has never been recorded here or anywhere near.