They told New Idea magazine: “She is trying to establish herself as a lifestyle mogul but now she’s competing with a royal rival.”

The King has also released a new men’s cologne, Highgrove Splash, retailing at £135 which has further dishearted the duchess as she was “planning to develop her own men’s grooming range”.

The insider explained: “She had no idea [about this] and now suddenly, as she sees it, there’s a glut of his products on the market.

“She’s one step away from calling Charles about the clash but Prince Harry is holding her back.”

They added that Meghan is “convinced” that Highgrove’s latest promotion is a “deliberate attempt to curb her success”.

The Duke and Duchess of Sussex have not travelled back to the UK together since September 2022, when they attended the late Queen Elizabeth’s funeral, due to their ongoing rift with the royals.

It comes as the couple were last seen attending the ESPY awards in the US last week, where Harry received the controversial Pat Tillman award for Service for the efforts he’s made with the Invictus Games.