Prince Harry is one with the British royal family in grieving for the loss of his grandfather, Prince Philip, and he has reportedly spoken to Prince Charles as he plans to return to London and attend the funeral.

According to reports, Prince Harry will likely be flying solo as his wife, Meghan Markle, is pregnant with their second child. The Duke of Sussex has also spoken to several members of his family, sources said.

Sources also said that Harry has specifically informed his cousins, Princess Eugenie and Princess Beatrice, that he "wants to be with everyone." When their grandfather was still at the hospital undergoing surgery in mid-March, Harry was reported to have started isolating in California in case he had to rush back home. A private jet was prepared to fly the Duke of Sussex.

Harry was close to Philip, who had been his immediate support when he and Prince William lost their mother, Princess Diana, at a young age. According to the book The Diana Chronicles, Philip was "brilliantly effective" in steering Harry and William in the days and weeks after Diana's passing as he frequently took the boys out for a walk or outdoor activities.

Upon Philip's retirement from public service in 2017, he passed on one of his ceremonial duties to Harry as the Captain General of the Royal Marines. Philip had taken on the role for 64 years.

In the hours following the confirmation of his death, Harry and Markle changed the front page of their website, Archewell, in honor of Philip and stated that they will miss their grandfather. The official royal family page also changed the content of their website to reflect tributes and honors for the Duke of Edinburgh.

Meanwhile, it's still unclear how Harry will be able to fly back to London, given the pandemic restrictions on international travel. While the Duke of Sussex has access to private planes, the United Kingdom government guidelines state the need for quarantining for travelers from abroad. Harry could be exempted due to the nature of his trip, as a family funeral is considered essential travel.

It's also unclear if Prince Harry has had his vaccination against COVID-19, diminishing his risk of passing on the virus if he's asymptomatic. In California, where the Duke and Duchess of Sussex are currently based, vaccinations for those under 50 will begin on April 15. Harry will likely get tested before he comes near family members, especially Queen Elizabeth.