There’s an interesting write up in last years Bird and mammal report by Richard Moores. Polecats have only recently made it into Norfolk but sightings continue to be made apace. Two were recovered as road kills at the beginning of this month south of Roughton on the A140. Both found on separate days; the first a female, the second a male.
The problem of sorting Polecats from Ferret/Polecat hybrids continues. I inspected the male and found it to be pure Polecat; or at least as pure as an external examination can conclude. The paws were all dark, the dark face mark came down to the nose, no paleness on the breast, a contrasting face patch and although the pelage was quite pale (probably still in its winter coat) there were no pale guard hairs.
A shame both animals had to die but it does show the species has a foothold here.
Letter From Norfolk 