This is Philip McGinley. Reasonably certain he’s a new cast member, with his tweeting with all the cast, having been in Belfast during the script reading, and I think he’s in the pic with Mackenzie Crook just outside the hotel with Gwendoline Christie, etc.
Basically he’s adorable. Here’s his Twitter.
Anyway, I like this one’s face and he posts dorky pictures on Twitter which is insta-win.