Carrie was keeping herself busy. When she wasn't sleeping, she was training or drawing up plans for her new handle or patrolling. She wasn't especially picky about what she did, as long as her nights were full. It was this need to keep herself busy and a thirst to improve her skill - things that certainly had nothing to do with Batman disappearing - that led Carrie to take the portkey and find herself in England.
Carrie hadn't really expected a mansion, but it was just as well that she be forced to train in one. It might help her get over some of the anxiety she felt whenever in close proximity to Wayne Manor. Raking a hand through her hair, Carrie took a deep breath and knocked on the door. She wasn't wearing her costume, but carried her gear with her underneath her top layer of clothes. Just in case.