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A stunning diamond brooch the Queen gave to a duchess who stood in for her for a rehearsal of the Coronation has emerged for sale for £6,000.

Lavinia Fitzalan-Howard, Duchess of Norfolk, doubled as Elizabeth II at Westminster Abbey for the practice run as the new monarch was too poorly to attend.

The Duchess of Norfolk donated the brooch to a charity auction in 1956 with the help of Australian cricketer, Ray Lindwall, visiting the country for the Ashes.