Kate Middleton has been snapped behind the scenes taking a photo of Camilla which will feature in Country Life Magazine's 125th anniversary special edition.The photo will also be used to mark the Duchess of Cornwall's upcoming 75th birthday, with the article being published on July 13. After the photo opportunity was commissioned by Camilla, she invited the Duchess of Cambridge, 40, to capture the cover image at her home in Wiltshire.The behind the scenes photo of Kate was posted to the Clarence House Instagram page, with the caption: "In celebration of The Duchess of Cornwall’s upcoming 75th birthday and the magazine’s 125th anniversary, Her Royal Highness has guest edited a special commemorative edition of @CountryLifeMagazine, to be published on Wednesday 13th July.
