For a moment she just closed her eyes and listened to him, a faint smile of relief spreading across her lips before she blinked herself into full alert mode, or as alert as she could manage.

She was hovering on the pavement just outside now, eyes desperately scanning the busy London road for any sign of him or the TARDIS. The noise of the traffic thumped inside her head, making her wince. People that walked towards her seemed to appear from nowhere, like she'd missed a beat here, a beat there, and then they were gone.

"I'm fine. I've just been looking for you." But the way her voice drifted like someone was playing with the volume control, she sounded far from fine.

"Where are you?"