Wondering whether this shot is good enough to get it to species
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I'm not sure you can get it to species. It's not clear whether the front and mid tarsi are pale or dark and the face cannot be seen. Eristalis are extremely variable in terms of the abdominal pattern, too.
My Flickr photos...
I still would not take this to species...the hind metatarsus does not look especially swollen to me and the face is just not visible (out of sight below the antennae). Frustrating, but Eristalis are quite tricky from photos....just needed that shot from the front to see the face clearly.
Lat/Lng: 53.7851, -0.6585
OS grid ref: SE884329