Prince Andrew is set to attend a royal event with King Charles today, but has been accused of trying to "worm his way back into public life".
The Duke of York will reportedly wear his ermine robes for the Royal Victorian Order party, which recognises service and loyalty to the monarch.
A dinner will also be held at Windsor with up to 600 guests making an appearance, including His Majesty and Prince Edward.
The velvet robes and glistening insignia denote his position as a Knight of the Garter - a personal honour still held by the Duke after he was stripped of his military and HRH titles.
Andrew was forced to step back from royal duties following a sex abuse scandal, which he denies.
He paid £12million in an out-of-court settlement to his accuser Virginia Giuffre, and was then blocked from appearing alongside the late Queen at the traditional Garter Day procession in Windsor.
Former MP Norman Baker said that the Duke is "going to any length possible to worm his way back into public life".
He told The Sun: "[Andrew] is simply being allowed to play dressing up as a royal for the day when really he should be serving a long period of silence."
Ingrid Seward, of Majesty magazine, said: "He is a member, so they probably couldn’t stop him going even if they wanted to."
It comes after reports that King Charles could ban his brother from wearing ceremonial robes at the coronation on May 6.
Andrew is reportedly "furious" that he could be stripped of the privilege, while the monarch is said to be undecided over the decision.
One source said the Duke of York had been “left completely in the dark” over his role and required dress for the coronation, despite other attendees being notified ahead of time.
The royal insider added: “Andrew is furious. He’s already not playing a part and now he feels he is being disrespected and dictated to over something he is fully entitled to (wear).”
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Meanwhile, at an event in New York earlier this month, Andrew's ex-wife Sarah Ferguson revealed she had not yet received an invitation to the Coronation.
She said: "I'm travelling at the moment, so maybe it [invitation] has gone to another place."
But she shrugged it off and told of what she will be doing instead if she is not picked to be inside Westminster Abbey.
She explained: "Well I've decided the best thing about being British around a coronation - although I've never been to one - I think we should, I should set up a tea room at the bottom of the drive with bunting and cakes."
The day itself will feature processions to and from Buckingham Palace, the solemn and religious coronation ceremony as well as an appearance on the palace balcony by Charles, Queen Camilla and other members of the Royal Family.
The Mirror has contacted Buckingham Palace and Prince Andrew's representative for comment.
