17 April 2014 11:00 PM
It is a widely accepted fact that the entertainment value of Antiques Roadshow has nothing to do with antiques. You watch it to see the looks on their faces when a beloved family heirloom is valued at precisely zilch. Or, if you're in a good mood, to share in their joy when junk from the attic turns out to be a priceless Ming dynasty vase. Posh Pawn, Channel 4's new docu-soap set in the world of high-end pawnbroking, aimed – and failed – to provide similar thrills.