Friends says Prince William mourns the strain of his relationship with his brother Harry

‘William alternates between grieving for what he has lost and feeling really, really angry about what his brother has done,’ said one insider.

‘He truly loves Harry and feels he has lost the only person, aside from his wife, who understood this strange life of theirs. But he believes there are things you just don’t do. And Harry has 100 per cent crossed that line.’

William also believes Harry has ‘disrespected the Queen and their family’, a friend says.

When asked if they thought William would ever mend his relationship with Harry, one buddy remarked, ‘That’s a hard question to answer.  The truth is they have got to find some common ground again at some point. But William is also very principled and believes Harry has crossed a line.

‘He’s thrown accusation after accusation, knowing that silence is the family’s only option because they don’t want to get dragged into a public slanging match. He sees how upset his father has been by it all, and it hurts.

‘William is absolutely allergic to drama but Harry has ensured that their family laundry is being aired on a global scale.’

William is still enraged for his wife, whom he says Meghan ‘massively disrespected’ when she said in an interview with Oprah Winfrey last year that it was Kate who made her cry before her wedding, not the other way around, and that Kate had apologized by bringing her flowers.

‘Despite much provocation, both William and Catherine have tried to keep the peace more than anyone will ever realise,’ a source says.

Another added: ‘Make no mistake, he’s angry. He believes Harry has disrespected the Queen and their family.’

Some members of William’s circle say he remains ‘protective’ of his younger brother and will ‘keep the door open to him forever’.

One said: ‘Harry always had concerns about life within the Royal Family and in hindsight the pressure that was put on him and William by living and working together as some sort of dynamic duo put massive strain on their relationship. They had no room to breathe. But Meghan complicated it.’