Here is Dan Hodges retailing a version of it:
Sitting on the front bench, Tony Blair surveyed the massed ranks of his parliamentary intake and then lent over to Gordon Brown.
“It’s weird,” he said “but there’s a guy back there who’s the splitting image of the boy who does your photocopying.”
“That is him,” Brown replied. “He’s your new MP for Shipley”.Informed speculation this weekend has it that Leslie, now MP for Nottingham East, will be appointed as his party's new shadow chancellor on Monday,
Which puts me in mind of Gilbert and Sullivan...