Ant-Like Bug

Originally I thought this was a nymph of the ant damsel bug, Himacerus mirmicoides.  However, on looking again at British Bugs, I now think it is a nymph of the capsid bug Miris striatus (Hemiptera: Miridae).  Only the early instar nymphs resemble ants; the adults look like fairly normal bugs.

Photos taken in Whiteknights Park, Reading University grounds, Reading, UK, on 2010-05-06.