Meghan Markle reportedly left the Princess of Wales “horrified” over an incident involving a member of her staff.

Meghan Markle left the Princess of Wales feeling “very upset” after criticising one of her members of staff at Kensington Palace, it has been claimed.

The incident, which was likely the ‘start of the end’ of their relationship, involved Meghan bursting into a “foot-stamping” rant, according to royal author Tom Quinn.

Claiming that he has spoken to staff members at Kensington Palace, Mr Quinn told the Daily Star that Meghan felt that she was not being treated as equal to Kate.

The author told the publication: “Meghan and Harry were living in what’s called Nottingham Cottage and it’s probably the only bit that you genuinely really could say, is actually quite small.

“And so I think that reminded Meghan that she was, as it were, second place or as the runner-up.”

Meghan Markle left the Princess of Wales feeling ‘horrified’ (Image: GETTY)

Speaking of the incident, he added: “So when Harry and Will got together and sometimes Meghan and Kate as well, because there was this tension occasionally, famously Meghan slightly lost her temper with a member of Kate’s staff in front of Kate.

“And it was that incident, that I was told by someone who was actually there, who said it was really uncomfortable because Meghan just lost it with this person.

“…It was almost as if in that one encounter, it encapsulated for Meghan the problem that she had, that she’s a Princess and she’s number two.”

He added: “She was very successful, coming into this alien environment where people behave towards you according to where you are in the status of who becomes King or Queen next, that’s just alien to her. The way it was described to me was, there were raised voices and foot-stamping.”

Meghan Markle reportedly felt like she treated differently to Kate (Image: PA)

Discussing Kate’s reaction, he added: “Meghan asked this person, I know who it was but I can’t say because it will give away my source, who works for Kate who was basically asked to do something by Meghan and said, ‘I’m really sorry I can’t do that because I work for Kate’.

“And Meghan really felt she had been slightly put in her place, because if you become a Princess you kind of assume that staff, when you ask them to do something, they are going to do it.

“She (Kate) was horrified, she was really upset because she’s very fond of this particular member of staff and she thought that Meghan almost bowling out this person was just completely unacceptable.”