"Prince Andrew has essentially been stripped of his Royal status."
Earlier this month Belfast City Council agreed not to fly the flag on Andrew's birthday but will raise it instead on July 1 to mark the anniversary of the Battle of the Somme, with the change agreed without a vote.
Unless government guidance changes, other local councils across the UK should still mark Andrew's birthday.
Andrew is set to be interviewed under oath at a neutral location in London on March 10.
Giuffre - who was formerly known as Virginia Roberts - has accused convicted sex offender Jeffrey Epstein - who committed suicide in August 2019 - and his one-time girlfriend Ghislaine Maxwell of arranging and forcing her into having sex with Andrew in 2001.
The prince has denied all of the allegations and his lawyers have confirmed he's ready to fight the case in court.
Andrew - who is not facing any legal action in the UK - previously requested a trial by jury.