An operation to excavate dozens of British Spitfires buried in Burma during the Second World War is set to begin next year.
It marks the climax of a 16-year search for the lost aircraft by Lincolnshire farmer and aircraft enthusiast David Cundall, who says it is a "major find".
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The memorial service will be attended by Prince Harry and Meghan Markle.
David Browning admits manslaughter by diminished responsibility but denies murder.
Four people have died and the suspect is still at large, police said.