Anthomyiid Fly

From back in the summer of 2009: a black and white anthomyiid fly, probably Anthomyia procellaris (Diptera: Anthomyiidae), based on my interpretation of comments by Michael Ackland here and here and by Joke van Erkelans here.  In particular, it is probably not A. pluvialis because in that species the black patch on the side of the scutum (top of the thorax) does not reach all the way down to the wing base.  The only other possibility in the UK would be A. bazini but that species is nowhere near as common as A. procellaris.

Photos taken in Whiteknights Park, Reading University grounds, Reading, UK, on 2009-07-22.