2025 Britannia UK 1/3oz Gold Proof Coin
The 2025 Britannia UK 1/3oz Gold Proof Coin is the first ever 1/3oz Britannia proof coin released by The Royal Mint, combining one of the United Kingdom’s most recognised coin designs with an unusually low limited edition.
Struck in 999.9 fine gold to proof standard, this release stands apart from the traditional Britannia proof range due to its unique fractional size and Limited Edition Presentation of just 550 coins worldwide.
The reverse features the iconic Britannia design, symbolising strength, resilience and stability, while the obverse displays the official portrait of King Charles III by Martin Jennings.
As official UK legal tender, the coin is VAT free and exempt from Capital Gains Tax for UK buyers.
The 2025 Britannia UK 1/3oz Gold Proof Coin offers a combination of low edition numbers, recognisable design and proof quality finish within one of Britain’s most established modern coin series.
Key Specifications:
• 1/3 Troy Ounce of 999.9 fine gold
• Proof finish
• Denomination: £50 (UK legal tender)
• Year: 2025
• Limited Edition Presentation: 550 coins worldwide
• Official Britannia proof release by The Royal Mint
• Features King Charles III portrait by Martin Jennings
• Supplied in official Royal Mint packaging with certificate of authenticity
• VAT free and CGT exempt for UK buyers
Why Buy This Coin
• First ever 1/3oz Britannia proof coin
• Limited edition of just 550 coins worldwide
• Part of the internationally recognised Britannia series
• Lower edition numbers than many standard Britannia proof releases
• Combines proof quality with fractional flexibility
• Official UK legal tender (CGT exempt)
Delivery
All orders are securely packaged and fully insured for UK delivery. Delivery is typically completed within 5–10 working days depending on availability. Parcels are dispatched discreetly for added security.
Prices are based on the live gold market and may update throughout the day.
Availability is dependent on market supply and may change.
















