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Meghan Markle has shared a series of 'summer holiday' photos of Prince Harry and their children Archie and Lilibet while in Europe - including what appears to be a visit to Princess Diana's childhood home.

The family had been visiting Europe in recent weeks ahead of Prince Harry's return to the UK this month to attend the Invictus Games in Birmingham where he had intended to bring Meghan and their two children with him for the entirety of the five-day trip.

Instead, he flew to Britain alone, and hours before he arrived in London, chaos erupted when an invitation to stay at Buckingham Palace was withdrawn.

Meghan delayed her arrival and entered the country secretly with Archie, seven, and Lilibet, five, amid ongoing security concerns.

It was not confirmed where they had been vacationing but it was widely believed to have been in Portugal, where the Sussexes reportedly purchased a second property near Harry's cousin, Princess Eugenie and her husband Jack Brooksbank.

Indeed, in one of the posts shared to her Instagram, Meghan shared the image of a front of a Portuguese fish restaurant.

Another post from the carousel is believed to show the family visiting Althorp, Princess Diana's childhood home.

In the shot, Lilibet was seen walking through an avenue of trees and hedges, with Harry and Archie strolling together up ahead appearing to hold bouquets.

Meghan Markle has shared a series of 'summer holiday' photos of Prince Harry and their children Archie and Lilibet while in Europe

Lilibet was seen walking through an avenue of trees and hedges - believed to be at Althorp, Princess Diana's childhood home - with Harry and Archie strolling together up ahead appearing to hold bouquets

An aerial view of Althorp House, Home of the aristocratic Spencer family and the location of the burial site of Diana, Princess of Wales

Archie also appeared in the cockpit of a plane donning a pilot's hat, while the three aviators surrounded him as he took a turn pretending to fly

Meghan posted one of herself lying on her front on a sun lounger while her head is close to a dog

The appearance of flowers has suggested to some that the family were visiting Diana's burial site, which is on an island in the middle of Oval lake, situated on the Spencer family's ancestral estate, according to People.

In one photo Meghan can be seen laughing with Harry at a dinner table, while in another she is seen walking near the beach with Lilibet.

There was also a shot of Archie walking barefoot in the sunset holding a stick and one of Harry playfully tossing Lilibet through the air while swimming in a pool.

Harry runs towards churning waves in another, with Lilibet and Archie dashing behind him in tow, while a woman - unclear if it is Meghan - watches from the shore.

Archie also appeared in the cockpit of a plane donning a pilot's hat, while the three aviators surrounded him as he took a turn pretending to fly.

In all the pictures of the children, they had their face turned away from the camera in a fashion that has become typical for Meghan - a move she has done to protect their privacy.

Meghan posted one of herself lying on her front on a sun lounger while her head is close to a dog.

Among the other snaps were shots of curated dinner tables, the restaurant O Melidense, and picked lavender stalks.