Meghan Markle's bodyguard quits after less than a year on the job

Meghan Markle's bodyguard quits after six months working for pregnant Duchess of Sussex

Meghan's personal assistant Melissa Touabti also announced in December after a similarly short period of time, just six months.

The departures have raised eyebrows and prompted claims that the prince, 34, and his wife have not endeared themselves to staff with reportedly dictatorial behaviour.

The 37-year-old pregnant Duchess of Sussex looked stunning on Monday, stepping out in a regal purple dress from Babaton by Aritizia and keeping warm with a cherry red peacoat by Sentaler.

The bodyguard, who is thought to hold the rank of inspector, had replaced Sgt Bill Renshaw, Harry's long-standing head of security, who retired after more than 30 years in the force.

Both Meghan and her husband, Prince Harry, are undertaking a day of engagements in Merseyside. According to royal biographer Andrew Morton, Meghan is very into food: "He loves cooking, exploring new foods, and experimenting with fresh flavours". Yet she only lasted about six months.

A source revealed: "Unlike someone who has grown up in the royal family and has been used to having close protection from an early age, it can be quite constraining".

It is understood that her Royal Protection Officer was anxious that Meghan wanted to be 'one of the people'. "Even though [Meghan] was a famous actress, she could still do what she wanted in the way of getting around freely".

In addition to Mayhew, the US-born former actress will become patron of the National Theatre, the Association of Commonwealth Universities and women's charity Smart Works, which Meghan has already visited.

She had been in an overcrowded market which was deemed a safety threat. Kensington Palace said it was due to "crowd management issues".

The Duchesses of Cambridge and Cornwall both also have female personal protection officers on their security teams.