Scathophaga calida - could there be two British species under this name?
Had lots of encounters with Scathophaga calida in the Hebrides this summer where it sometimes outnumbers S. litorea. Was just adding some additonal photos to my Flickr site last night (and comparing the material I had to hand) which allowed me to critically compare my Hebridean material (that is the clearly the same as Skye material from Jon Cole at OUM) with some Shetland material sent to me by Roger Thomason a few years ago (also featured in the Diptera.info gallery as photos of living flies).