Harry, 36, is not expected to be joined by Meghan, 39, when he flies in for the sombre affair as she is heavily pregnant with their second baby, a girl.
Under the Government’s Covid travel rules, overseas arrivals have to quarantine for 10 days after touching down in England.
But the duke is understood to be permitted to use a diplomatic exemption to waive the self-isolation requirement, according to the Daily Mail.
Reports suggest Harry would take a Covid test before boarding a plane in California and another one upon arrival in Britain.
Prince Harry may be allowed to use a diplomatic extension to avoid quarantine in the UK
The Duke of Sussex is expected to make the journey to the UK without Meghan
Travellers in quarantine are permitted to be released five days after arriving in the UK if they test negative for the virus.
Harry was last pictured alongside his grandfather in May 2019 as he and Meghan introduced their newborn son Archie to his great-grandparents.
Later that year the Sussexes opted to spend Thanksgiving and Christmas in Canada instead of the traditional royal celebration with family members at Sandringham.
After jetting to the Great White North in late 2019 with Archie, the couple returned twice to the UK the following year to announce their departure from royal life and carry out their final engagements.
Meghan is heavily pregnant and is not expected to attend Prince Philip’s funeral
However, they left their son behind on both occasions. This means that the last time Philip saw Archie would have been in late 2019.
Philip, 99, likely made his own funeral plans which will now have to be revised due to the coronavirus pandemic.
Given his age, the detailed plans for what should happen after Philip’s passing — codenamed “Operation Forth Bridge” — have been in place for years.
The College of Arms said the funeral plans were “in line with custom and with His Royal Highness’s wishes”.
Prince Harry shares a joke with his grandfather Prince Philip
Prince Harry is widely expected to fly to the UK for the funeral
They added that the public are “regretfully” asked not to attend Philip’s funeral due to the pandemic.
The college, which helps to organise state occasions, said the Queen’s husband will not have a state funeral and there will be no lying-in-state.
They said the prince will lie at rest in Windsor Castle before a ceremonial funeral at St George’s Chapel.
The honour of a lying-in-state was bestowed upon the last three sovereign’s consorts, including the Queen Mother in 2002.
Prince Philip’s royal timeline
An estimated 200,000 members of the public queued to pay their respects over three days at Westminster Hall.
Shortly after the news broke on Friday afternoon, mourners began arriving at Windsor Castle to lay flowers and pay their respects.
Flags will fly at half-mast on Government buildings from now until 8am on the day of the funeral.
Buckingham Palace is expected to announce the full details of Philip’s funeral.
Harry and Meghan pictured at their final engagement in March 2020
The Number 10 official website accidentally let slip the planned date – Saturday April 17.
A statement carried on the gov.uk website read: “On April 9, 2021, Buckingham Palace announced the death of His Royal Highness The Duke of Edinburgh.
“From this date, a period of national mourning began and will continue for eight days until the morning of the funeral.
“During that time the Government will issue guidance for the public, organisations and businesses for observing the period of mourning.”
Source: EXPRESS CO UK