Thanks Wurzel. I appreciate the confirmation - it was the sheer numbers which put doubts in my mind (despite the Small Skippers amongst them) as this would seem to indicate that they have been out for quite a few days.
Yesterday I thought it was high time I had a look locally for PE. Despite the cloudy, overcast conditions it was quite warm and a good number of butterflies were on the wing. The weather doesn't usually deter me these days as in 2012 I saw 2PE's sparring in the rain (altho' they probably didn't have any choice that year!). I headed for Alice Holt and just by the entrance, on the nettles, were several nests of what I assume to be Peacocks (I have never seen them as cats before

). Sadly, 2 of these nests appeared to have been attacked by some sort of fly which seemed to be systematically killing the butterflies. Between plundering the cats he would take a break, wipe his face, then start again

I was horrified:
I walked slowly along the track, looking both at the ground and the canopy, but no sightings of PE. I came to a colony of Small Skippers. Not only do I find these butterflies extremely photogenic, I also think they are very obliging, and I enjoyed several minutes taking various shots of them:
On leaving I took a last look at the remaining Peacock nest which seemed to be thriving but for how long?
and at the same time spotted this very attractive moth:
I decided to check for PE across the road at the Straits but despite a lot of butterfly activity, yet again, I could not spot a single one. The number of SW (including females) is gradually increasing and White Admirals were aplenty, although getting close to them was another matter. Where did they all come from??? Where were the cats and pupa hiding??? I shall need to try harder next year

Some very nice Large Skippers along the route:
The morning was still young so I decided to make a detour on the way home and check out the DGF's which I had been told were flying at Noar Hill. It was also an opportunity to try to find the DoB cat as I have never seen one before and was intrigued by Ashley's recent posting. Sure enough, there were about 5 DGF and they were very active. There could have been more but photos were almost impossible and this is the best I could do:
Noar Hill was looking particularly attractive so it was no hardship to spend time here looking at Cowslip leaves
Whilst looking I came across a couple of caterpillars - i have no idea what either is but neither were my target:
I focused on the areas where I remembered the density of the imago to have been the greatest and I found many leaves 'peppered with gunshot' but not a caterpillar to be found. A few of the leaves had what looked like a moulted caterpillar skin on the back but that is as close as I got and whether it was a DoB I have no idea:
I was starting to feel a bit peckish and decided to return for lunch. On my way back to the car I saw my first Hummingbird Hawk moth of the season. It was impossibly fast and this photo is very blurred but I shall keep it as it is the only one I have