Prince Andrew has refused to let being stripped of his Grenadier Guards' privileges stop him from wearing their kit, it has been reported.
The Duke of York had his ceremonial title as colonel of the regiment removed by the Queen amid a sexual assault scandal which saw him pay millions to settle a civil case.
Prince Andrew has always denied any wrongdoing.
According to reports the Duke has urged his mother the Queen to restore the title, but says Prince Charles and Prince William have blocked the reinstatement.
And now the Duke has allegedly been seen wearing the regiment's royal cypher on a fleece and jacket while out horse riding in Windsor.
The 62-year-old has never served as a guardsman, although he was a helicopter pilot for the Royal Navy during the Falklands War.
Former Grenadier Guard Julian Perreira, who served three tours of Afghanistan, said in quotes reported by The Sun : “It’s wholly inappropriate that he continues to wear the uniform.
“He has been asked to leave and hand over his title. He is continuing to tarnish the regiment.
“He didn’t serve in the Grenadier Guards, it was only ceremonial so he has no right to continue to wear the royal cypher. But no one can officially tell him to stop wearing it and he knows he can get away with it.”
According to reports a source added: “It is pretty clear he is doing it deliberately and stepped it up as soon as he was told he wouldn’t get his post back.”
The Grenadier Guards "is one of the oldest and most iconic regiments in the British Army," according to army.mod.uk.
"Whether they are fighting on the front line or guarding a Royal Palace, members of the Regiment are renowned for their determination, loyalty and grit."