On Breckland thyme in an area of acid heathland
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The yellow stripe is shared by other species within Sphaerophoria, so is not diagnostic. The clincher is the length of the abdomen, for scripta males. The wings, when folded, do not come close to being as long as the abdomen. I think you can see that that would be true here, but the angle is not great.
My Flickr photos...
Hi Ian, thanks for the comments. My id was also based on observations at the time and other photos (all more blurry than this one, they move fast in full sun). Only got fleeting glimpses of the folded wing but I thought I could see the whole of the fifth abdominal segment projecting clear of the wing.
Yes, it does look right for scripta. Often, the males are very large, too, and really stand out as quite impressive beasts. Unfortunately, your other pic is a female, so that does not help clinch the ID. Nice picture, though!
Lat/Lng: 52.42474, 0.70617
OS grid ref: TL841841