The Royal Lancers were today presented with a new Guidon by Her Majesty The Queen.
The monarch also added an honorific suffix to the regiment's name to mark 70 years of her being its Colonel-in-Chief. The regiment will now be known as The Royal Lancers (The Queen Elizabeths' Own)
Also in attendance at the Berkshire residence was His Royal Highness The Duke of York, who is Deputy Colonel-in-Chief.
The prestigious event, which took place inside the castle's St George's Hall, saw Her Majesty present the new Guidon to the Regiment.
In a speech to members of The Royal Lancers and their special guests Her Majesty said: "The Guidon symbolises sacred loyalty to your Sovereign, your country, and to all of the officers and men with whom you serve.
"Your loyalty and devotion to duty have been tested over more than three hundred years, and never found to be wanting.
"Acts of bravery and skill-at-arms run through your regimental history, and many of your most famous feats are recalled here, carried on this Guidon.
“To mark my 70th anniversary as your Colonel in Chief I should like to grant you a further distinction – that of an honorific suffix to The Royal Lancers – Queen Elizabeths’ Own - in recognitionon of your loyal service to me and to my mother, Queen Elizabeth.
“I entrust this Guidon to your care, confident that the Officers, Non Commissioned Officers and Men of The Royal Lancers will maintain the same high standards as your forebears. I pray that God’s blessing will go with you."
Music for the ceremony, which included the National Anthem and Wellington, was played by The Band of the Royal Armoured Corps.
Following the ceremony, The Queen and The Duke of York met with former colonels of the regiment and members of the regimental family in the Grand Reception Room.
Speaking after the event, Brigadier Andrew Hughes, Colonel of The Royal Lancers, said: “This is an important day because we have received our guidon and also a new name, which brings unity to our regiment, the Sovereign and the nation.
“It has been a stunning event in Windsor and an enormous privilege for everyone – it has been a unique experience.”
Sgt David Veale, of the Royal Lancers, added: “Having the guidon and the name of The Royal Lancers (Queen Elizabeths’ Own) completes the amalgamation of two regiments, which means a lot.
“It has been a daunting but very proud day.”
A guidon is a heraldic banner carried by cavalry regiments in the same way that the colours are borne by regiments of line infantry.
Until about a century ago guidons and colours were taken into battle as the distinguishing symbols and rallying points for fighting units.
The Royal Lancers are 12 Armoured Infantry Brigade’s Armoured Cavalry Regiment based in Catterick, North Yorkshire.
The Regiment was formed following the amalgamation of the 9th/12th Royal Lancers (Prince of Wales’s) and The Queen’s Royal Lancers on the 2nd May 2015.
Both of these regiments have recent and extensive operational experience, most recently with the 9th/12th Lancers being the last cavalry regiment in Afghanistan and The Queen’s Royal Lancers the last regiment to operate the Combat Vehicle Reconnaissance (Tracked) in Afghanistan.
The Lancers' distinctive cap-badge represents their Regimental Motto, 'Death or Glory'.