SARAH: It's weird seeing London like this. All those deserted streets.

YATES: I rather like it.

YATES: Have you noticed the air?

SARAH: Hmm?

YATES: It's clean. No cars, no people. Do you know yesterday I saw a fox in Piccadilly?

SARAH: And nightingales in Berkeley Square?

YATES: It's not impossible.

SARAH: No. No, I like London the way it was, traffic jams and all.

YATES: Yes, I expect you're right.