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I think this is the last spotty winged fly for today. I thought it was the same as one of the others I've just posted, but on closer inspection the pattern is different.

I'm stumped...

Tephritidae is as close as I can get...

This photo was taken last summer (2011) in my garden in Mid-essex. The fly was cavorting (on its own...) on golden rod. I have other shots of what I think is the same fly in different attitudes taken on other days, if they would be of any help. Please let me know and I'll post them, I don't want to overwhelm you!

Best wishes,
Ginks