On a short hedge just inland from the S. Devon coast path.
Not sure about this specimen. Thought the yellow abdominal bands look more like C. elegans and when I try to run it through the ID keys, C. elegans still appears to be a better match; although these images are far from ideal and I can't easily see any thoracic hair.
I'm in the correct area for C. elegans and although it is generally a woodland species I understand that they have been sighted along cliff tops in the SW.
But there are several very similar species; so other opinions would be welcomed.
ps. Very nearly missed this one as at first glance, without my glasses, I thought it was just another Syrphus ribesii.