Green Tachinid Fly

A metallic-green tachinid fly, probably Gymnocheta viridis (Diptera: Tachinidae).  This species is distinguished from the other spiny-abdomened green flies of similar size by the fact that both of the veins in the middle of the trailing edges of the wing extend past the 'bend' (but not right to the edge of the wing).  The trailing edges of the wings are rather ragged in this specimen.

Photo taken in Whiteknights Park, Reading University grounds, Reading, UK, on 2010-05-23.