Charles and Camilla invested years in transforming cottage (Image: Getty)

       King Charles is upset over his eldest son’s decision to rent out his beloved Welsh holiday bolthole.

       The monarch snapped up the ￡1.2million cottage through the Duchy of Cornwall in 2007 and has spent years lovingly restoring it.

       The Llwynywermod holiday home, on the outskirts of the Brecon Beacons National Park, was taken over by William when he became the Prince of Wales after the late Queen’s death last year.

       Now it’s said William wants to turn the secluded cottage into a holiday home – leaving Charles “miffed and disappointed”.

       The King will have to pay rent if he ever stays there again.

       READ MORE King Charles is ‘quite miffed’ to have to leave ￡1.2m Welsh home

       William wants to turn the cottage into a holiday home (Image: Getty)

       Llwynywermod will be marketed to holidaymakers after September, and Charles is currently having his belongings at the house placed in storage.

       The King spent at least a week every year at Llwynywermod after leasing it back from the Duchy.

       He voluntarily gave up the lease when the Duchy passed to his elder son. A Royal source said: “The King was quite miffed but that was the deal. It means he can continue to stay there, but will pay rent to the Duchy, and the rest of the time it will be rented out.”

       The King and Queen invested a lot of time and energy into the renovation of Llwynywermod.

       It was restored with the help of architect Craig Hamilton and the interiors are by the Queen’s sister, Annabel Elliot, in a rustic style.

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       Charles and Camilla at Llwynywermod (Image: Getty)

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       The Royal source added: “Charles has agreed to pay for the topiary upkeep as he doesn’t want to see all the good work go to waste.”

       The idyllic cottage includes a barn attached to the main three-bedroom house, which was renovated using

       traditional techniques, and 192 acres of rolling countryside.

       Nearby properties owned by the Duchy are already let out. Three-bed North Range costs ￡2,400 a week.

       William wants to spend more time in Wales, but will stay in B&Bs and holiday rentals, supporting the tourist industry.

       Buckingham Palace said: “Should His Majesty stay there in the future, that would be under commercial terms with the Duchy, in the same way that applies to His Majesty’s occupancy of Highgrove, similarly owned by the Duchy.”

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