Fungus Gnat

At first I assumed this was a sawfly, but I couldn't narrow down the identification any further.  A week or two later, while looking for something else, I came across this photo by James Lindsey and realized that it wasn't a sawfly but a member of the obscure family Sciaridae or fungus gnats.  It is a Sciara sp, possibly either S. hemerobioides (= S. thomae = Lycoria thomae) or S. analis, (Diptera: Sciaridae).

Photos taken above Hutton Village, near Guisborough, North Yorkshire, UK, on 2010-08-10.