Mr Cundall said: ''They told Jim: 'We've done some pretty silly things in our time, but the silliest was burying Spitfires.' And when Jim got back from the US, he told me.''

Mr Cundall realised the Spitfires would have been buried as they had been shipped, still in their crates. Before they were shipped to the Far East, they would have been waxed, wrapped in greased paper and their joints tarred, to protect them against the elements.

The first step was to place advertisements in magazines, trying to find soldiers who buried Spitfires. ''The trouble was that many of them were dying of old age,'' Mr Cundall said. He visited Burma over and over again, slowly building relations with its junta. Finally, he found the Spitfires, at a location that is being kept a secret. Mr Cundall said: ''We sent a borehole down and used a camera to look at the crates. They seemed to be in good condition.''

In August 1945, the Mark XIV aircraft, which used Rolls-Royce Griffon engines instead of the Merlins of earlier models, were put in crates and transported from a factory in the West Midlands to Burma. Once they arrived, however, the Spitfires were deemed surplus to requirements. The order was given to bury 12 Spitfires without even unpacking them. It is possible that a further eight were then buried in December 1945.

Mr Cundall said: ''In 1945, Spitfires were 10 a penny. Jets were coming into service. Spitfires were struck off charge, unwanted. Lots of Spitfires were just pushed off the back of aircraft carriers into the sea. On land, you couldn't leave them for the locals - they might have ended up being used against you.''