'Had that Kate Middleton in the back of my cab ten minutes ago,' the taxi driver announced proudly, 'just dropped her off outside the Palace.'
'Aha, I thought so!' the passenger exclaimed.
'You mean you saw her getting out of the cab before you hailed me?'
'Er, not exactly, mate.'
'So, how did you guess she'd been my fare?'
'The back seat's covered in vomit, that's why!'
Sick joke, eh?
