Reminds me of a story my friend, who study abroad in the Wales and came back recently, told me. During the Euro cup, he was watching the matches in a pub filled with Wales supporters. Then some guy walked in with an England T-shirt. Everyone immediately stop and stare at that guy. It ended peacefully with that guy leaving quietly.
St. Gloriana are A. only LARPing as Brits and B. are LARPing as upper-class Brits. So they probably would call football and rugby 'soccer' and 'rugger' respectively.
