"Sometimes we might happen on a sunny patch, but London Below leans towards the murky."

She'll make sure they take the shadowed paths as much as possible. That won't be hard.

"Okay, so first thing, for me to bring you with me, you'll need to hang onto me when I find doors to open. You can take my arm, if you'd like, or hang onto my shoulder, hold my hand, whatever. Once we're through you can let go and be on your own, but it is a bit of physical contact. Is that all right?"