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I suspect you are right, as the (currently) common M. lasiophthalma would show a duskier scutellum with a dark smudge around the edge. Not easy from a photo, though.
My Flickr photos...
Thanks for your comments. V low depth of field as I had no flash yesterday and it was a bit windy. I want to learn more about hoverflies and if time allows I will try to post many more observations this year.
Lat/Lng: 52.725425502573, 0.30971199274063
OS grid ref: TF560166
Sown wildflower meadow about 10 years old