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Looking at key in Anthomyiidae Handout Vol 1 by Ackland/Brighton/Bentley from Dipterists Forum :

If Paradelia, then :
-Legs not yellow rules out P.lunatifrons.
-Katepisternum almost entirely grey dusted rules out P.brunneonigra.

I do not think you can rule out P.hedgreni through the key (difficult to see if calypters are orange or grey-brown) but there is only one known record from Scotland of this species. P.intersecta is well distributed across UK.