Rupert Maas met the owner of the Hockney at the Antiques Roadshow event at Belmont House, near Faversham in Kent
The work, a field in pastel colours, was sold by Hockney to a railway signalman near Felixstowe in 1957, and kept by his family.The programme's art expert Rupert Maas said it was an "extraordinary story".The painting's owner, who is not being named by the BBC, appeared on the show that was filmed at Belmont House in Kent.
Mr Maas said he had been "initially incredulous", but as he researched the story, he discovered Hockney had been in the area in 1957, with fellow Bradford Art College student, John Loker."When he offered him Sunday lunch, it's the most extraordinary story."