Miracle art: could there be a priceless masterpiece lurking in your home?

Many people fantasise about finding a priceless work in a car boot sale or dusty loft. But what really happens when you find a Ming vase on a shelf, a Pollock in a thrift store or a Michelangelo behind the sofa? Hannah O’Leary knew right away that she was looking at something very special. The art specialist had been called to a flat in London to take a look at a painting. If its owners thought it was valuable, they had a funny way of showing it – they were using it as their kitchen noticebo