Tiny Chalcid Wasp

From early October, a tiny (3mm) chalcid wasp on an oak leaf. Note the small black spots on the wings that are connected to the leading edges by a dark vein.  This feature seems to be present in many species in the family Pteromalidae (see here, here and here), but the blurry nature of my photos prevents me from narrowing the identification any further.

Photos taken in Whiteknights Park, Reading University grounds, Reading, UK, on 2009-10-04.