I often see the above phrase used on usenet as a sarcastic way of saying “What you just wrote reminds me of So-and-So.” Where does this phrase come from?
This dates from newspaper competitions that used to be run about thirty to forty years ago. The newspaper would print the picture of someone and announce that they would be walking up and down the promenade at somewhere like Brighton ( it was usually a sea-side resort ). What you had to do was memorise a phrase such as " you are Joe Smith from the Daily Mirror and I claim my £5" . When you saw the man you went up to him , and , If you recited the phrase word perfect , you got your £5. I suppose it was a way of selling more papers because people;e would buy a copy to see who it was in the picture and what the phrase was. Such innocent days!
And for you Graham Greene fans out there, then The Daily Messanger’s X was Kolley Kibber.
Ah yes …Brighton Rock
No! No! I’m not so-and-so, and I don’t have your bloody fiver! That’s him over there! 
Thanks for the info!