There is only so much she can learn about her heritage, and her abilities, from her mother and through experimentation.
The Elder Continent is, if not precisely off limits, not somewhere she even wants to try to go until she knows more. So: London, which is much closer anyway. She'd have to pass through to make it to the Continent anyway.
The stalagmites thin, and she blinks as she steps out into the lights of Mrs. Plenty's Carnival.