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Can anyone identify this fly with any certainty?

Photographed on 5th September 2009 feeding on Ivy flowers in a Wiltshire UK garden.

To a non expert like me there are a lot of flies around that look at first glance a bit like the common flesh fly Sarcophaga carnaria, but I'm starting to tune into differences better and i think the wing veins are all wrong here and this was a bit less "big and bristly" than a flesh fly.

NickU - Generalist naturalist and photographer.