Enter Milko den Leeuw, a Dutch restorer and art researcher who has, he believes, developed the definitive method for authenticating works of art, and an alternative to the flawed established authentication process currently in place.

FORBES: This Man Could Save You Millions - Or Help Discover Them.

Anyone seeking definitive advice on which method is best will, I fear, be disappointed by the chief inspector's conclusion that "there is no clear statistical link between the extent of setting in schools and the attainment of pupils".

BBC: Setting, streaming - how schools teach