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The special one-hour documentary follows the remaining four chefs as they cook and serve their winning dishes to the troops returning from Afghanistan.
"I'm honoured to be hosting such a prestigious and rewarding event for the BBC's Great British Menu," said Kemp. "It is fantastic that some of the UK's top chefs are cooking the best British food for our deserving troops heading home from active service."
He added: "I've been to Afghanistan myself and seen the unbelievable work that they do out there - they really are worthy of an amazing meal and to see such a collaboration should make us all very proud to be British."
The special show will air on Tuesday, June 16 at 8pm on BBC Two.
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