The Duke of Sussex is expected to return to the UK in September

Prince Harry's hopes of rebuilding relations with the Royal Family have become even more prevalent amid claims he is beginning to feel "unwelcome in America".

Despite the disarray surrounding his visit last week and the crushing court defeat, Harry likely left the UK with a smile on his face.

That is because his children were once again reunited with the King when the Sussexes travelled to Highgrove estate on Friday afternoon.

No photos or information has been made public - as per the Palace's demands - but it is understood that Queen Camilla was there, and the afternoon tea session lasted around an hour.

"Harry was never going to let the kids down, they were so invested in the trip," a friend of the duke told the Daily Mail.

"They FaceTime with Charles all the time, so they already have a relationship but they were so excited to finally come.

Reconciliation with his father seems to be the driving force for Harry to return to the UK again - which he is doing so in September for another charity appearance.

Whether the children and Meghan will join the prince is unknown.

Back in the States, the Sussexes' American dream could be all but over - and it might not just be Harry pushing to get cosy with the Royal Family once more.

The friend added: "There is definitely a feeling in his camp that he has started to feel a bit unwelcome in America.

"That has been an increasing and significant shift in sentiment, a feeling that the American dream might not be all that it was cracked up to be.

"I am told that this is coming from Meghan as well as from him. I hear that Meghan is all for rekindling with and reconnecting with Harry’s English side. She is fully behind it."

Meghan has also faced setbacks in her post-royal ventures in recent months.

Despite being nominated for a Daytime Emmy this week, Meghan's Netflix venture, With Love, Meghan, received poor reviews and failed to reach Netflix's top 1,000 most-watched programmes during the period covered by the company's viewing data.

Although launched alongside the Netflix series, As Ever has since moved forward independently, with a spokesman saying in March that the brand was "now ready to stand on its own".

The friend told the outlet that the "American dream is cooling" and that Meghan "feels an outcast status as well".

The professional setbacks have coincided with personal frustrations over the couple's relationship with Britain. A source revealed to People magazine earlier this week that the duchess experienced "a lot of sadness" after her hopes of publicly supporting her husband at events in London and Birmingham collapsed.

But while the door could be creeping ajar ever so slightly more, the security issue still remains - though royal commentator Richard Fitzwilliams told GB News: "The security situation could change."

Despite this, Harry's latest visit appears to have strengthened his determination to maintain ties with Britain. With another trip already planned for September, the reunion at Highgrove could prove to be an important step in the family's slow path towards reconciliation.