Snow bunting, Winter Hill

There's been a cracking male snow bunting on Winter Hill for a couple of weeks, hanging around the trig point. It was surprisingly elusive today, but I did get some decent views of the bird. To me it looks like an adult male in winter plumage and most likely of the race P.n. insulae. My photos aren't that great, but it's a male because it has white lesser and median coverts, black tipped white primary coverts and square edged black centered scapulars. It's insulae because it has black tipped white primary coverts and in the field I saw clearly a brown rump with dark centers to the feathers.