Princess Diana
Diana pictured in 1995 Reuters

Princess Diana's final resting place is to undergo a major revamp, which is expected to be completed by the 20th anniversary of her death in August 2017. She was laid to rest at an island in the middle of the Althorp Estate in Northamptonshire, the Spencer's 500-year-old ancestral estate, on 6 September 1997.

According to a statement on the Althorp website, the project will be supervised by Earl Spencer, the late princess's brother, and his third wife, Lady Karen. "It is the first major revamp of the gardens in 350 years."

Earlier in 2014, Diana's personal chef Darren McGrady, had criticised the Spencer family for the negligence of the princess's resting place. He took to Twitter and said, "If I cared for Princess Diana in life as you are doing in death I would have been fired. Please tidy up the vegetation on the island."

"Made me so sad to see how Althorp Estate has neglected Princess Diana's resting place," he added.

After the Princess of Wales's death 36 oak trees with hundreds of white water lilies and roses were planted at the island to mark each year of her life, the Daily Mail reported. However, the exact site of her grave has not been disclosed to the public and visitors entering the estate are not allowed to visit the island.

In 2017, on her death anniversary in August, Prince William and Prince Harry will honour their mother with a new memorial garden at Kensington Palace along with an exhibition inside the palace. "I always feel a gaping hole in my life. All I want to do is make my mother incredibly proud," Harry, 31, had earlier said.