She lets out a triumphant whoop as she swerves violently past a flock of ducks, she risks a quick punch of the air with both fists before slamming her hands back onto the wheel and climbing higher into the cloudy hue of sky.

She had never felt so free, so elated. She was laughing, laughing at herself, at her situation, laughing at the whole damn world because now she could see it all, her and her flying bus.

Her mind skimmed briefly over the events of the day, the worm hole, the Tritavores, the Doctor. When she had left him, far below, beaming at her, she had felt a pang of regret and perhaps of anger. He had mentioned a friend, presumably someone he'd travelled with, so why had he turned her down? Surely she'd proven herself: saving his life, arguably saving the whole world?

But now, up so high, more free than she ever could have hoped she didn't care, she simply longed to see over that horizon, she could go anywhere, everywhere. She could literally touch the skies. As if to prove it she flung one hand out of the broken window beside her and let the clouds pass through her fingers, freezing them to the bone.

Oh yes, she was ready for anything.

And maybe one day if the Doctor happened to look up and see a 200 London double-decker soaring above him, and maybe if he wanted to get reacquainted and invite her for a ride in his time ship Lady Christina De Souza would take him on a tour of her skies.