Clouded Yellow (male I think)
As well as these butterflies I also managed to find the following: Speckled Wood (5), Meadow Brown (5), Small Copper (5), Small Tortoiseshell (1), Comma (1), Peacock (1), Large White (2), Small White (2) and another species that I've yet to identify- oooh!!
Comma (1st Linacre record this year)
Whilst looking at the butterflies, there was also a hawker species of dragonfly flying about, lots of hoverflies, bumblebees and some lovely birds including the flock of 15 Crossbills seen at the weekend, a possible family group of 4 Common Buzzards right overhead, 3 Swallows, 2 squabbling Kingfishers on the middle reservoir (my first record of more than one bird together) and Linnets, that were heard, but not seen (first Linacre record of 2013). Not a bad hour and a half, by anyone's standards.