Have a look at this: https://www.vwt.org.uk/wp-content/uploads/2015/04/MustelidLeaflet.pdf
Nice of them to arrange the species into roadkill positions to aid Dicki's identification. I stick with polecat I think.
Yes, unless Dicki can return to the scene and measure the carcass, Polecat is most likely. ( Even this would be subject to age and gender variation).
@owl started
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Have a look at this:
https://www.vwt.org.uk/wp-content/uploads/2015/04/MustelidLeaflet.pdf