Having been frustrated by the weather at the weekend and unable to go butterflying, I decided to take Wednesday afternoon off work when I saw the forecast was for dry, if not exactly warm or sunny, weather. I still wanted to visit Bedford Purlieus in search of White-letter Hairstreaks, which I'd only seen at a distance and not photographed. It's rather late in the season, but this was probably my last chance.
The skies were pretty heavy when I got there, but I started on the southern ride where there were plenty of valerian and marjoram flowers. I soon saw a few Meadow Browns and Ringlets, and a couple of rather elderly Silver-washed Fritillaries.
#1 Silver-washed Fritillary

#2 Ringlet

I walked up and down the ride, looking closely for WLH, but to no avail. So I decided to try to photograph the SWFs. I saw one land, lined up my camera, and then spotted a dark triangle hanging beneath a thistle head between my camera and the SWF. Yes, it was a WLH. An old and very tatty one, but I managed a couple of shots before losing it.
As the afternoon progressed, the weather brightened a little, and I soon found two more tatty WLH next to each other on some marjoram, and shortly after that a much fresher-looking one which made for much better photos.
#3 Reasonably fresh White-letter Hairstreak

Brown Argus were also quite plentiful, and good posers:
#4 Brown Argus underside...

#5 ... and upperside

I didn't realise they grew on trees though. Who knew?

#6 The Brown Argus Tree

#7 Large White

#8 Holly blue

After several hours on this one patch of ride, and with the sun getting lower, I decided to try the main Bedford Purlieus ride in search of Purple Hairstreaks. I saw a few, but only at the top of the sunlit oaks, with none venturing within range of my camera.
As I went to head home, a rather lovely Red Admiral was waiting on the gatepost next to my car:
#9 Red Admiral

A good afternoon with 15 species in all:
Meadow Brown
Ringlet
Gatekeeper
Small White
Large White
Green-veined White
Large Skipper
Silver-washed Fritillary
Red Admiral
White Admiral
Comma
White-letter Hairstreak
Purple Hairstreak
Brown Argus
Holly Blue