Roger had gone to the event out of wanting to watch as well as the fact that he was curious about the Scottish coronation. He did admire their purist beliefs and after everything that happened in Wales, it was a nice escape. But promising Ginny and Carys he'd be fine, he made his way over to Scotland.
The coronation had went along nicely, but right as it was about to end spells had started and Roger had heard a crack and seen some laceration, but that wasn't going to phase him. Besides, right now he was looking for someone to help him kick ass.