Had a couple of hours this morning watching for White-Letter Hairstreaks. Still not that many showing themselves but I still think they will. They are appearing on a variety of trees at the moment which keeps you moving around. There are plenty of Purple Hairstreaks, infact I went back this evening and saw them everywhere, they are more flighty in the evening, flitting from oak tree to ash from ash to hawthorn, even down to head height, I must have seen at least 20. Colin Jupp always does an evening watch and I can see why.