I take it the insect at right is a Psyllid bug? I cannot match it on the British Bugs website. It is 2.8 mm long by calculation, excluding wings, and is on Agrimony. It was stationary. The small chap at left is 0.7 mm long, and was moving slowly away from the larger insect. Is this an aphid?
West Sussex Low Weald, 03/07/2010.
Well I will show my hand - I'm reckoning that it 'could' be Triozoa urticae, the image below 'borrowed' from www.britishbugs.org.uk/
accredited to and copyright of Shane Farrell.
And bottom is a cropped version of Rellis' original - looks like it could be snap to me.
Let's see what Paul digs up though.
That makes sense - particularly as it was not on Agrimony as stated, but Nettle! I checked my photographic sequence where I'd moved from Agrimony to nettles, and realized I'd got it on the wrong plant.
Thanks for your help.