Lizzie, perhaps he is waring a short sleeved, dark Aran with a very low profile?

But:

"Folk music has had a bad rap over the years, in the past any mention of the genre would elicit sniggering jokes about men with beards wearing Arran sweaters. But this is set to change, the increasing popularity of folk-influenced musicians such as KT Tunstall and David Gray has shown that folk doesn't have to be uncool."

This from the site mentioned by Lizzie. It's a great relief to know that we don't have to wear that uniform any longer. Where would we be without the music press?