Oliver had only just received the owl inviting him to tag along to Bill's stag party. He had debated going, not sure if he wanted to or not. But in the end he'd tugged on a kilt and a decent shirt, done a bit with his hair and made his way out- a night out with his mates couldn't be too bad, could it?
He arrived just after Bill, brightening with a grin when he saw Fred at the top of the stairs. "Hullo, mates!" he exclaimed, clapping Bill on the shoulder. "And congratulations to ye!"