A Newsnight investigation into the growing trade in works of art produced, according to a Christie's expert, by 'master craftsmen' - in plastic?
Reporter Roger Cook follows the trail of some replicas of 19th century ivory carvings so good that even the experts have been fooled.
It took him from a factory on the south coast of England, to auction rooms and antique shops around Europe. It led to some surprising discoveries - and to three cracked ribs.

(First shown in Newsnight)