
Decimalisation, or Decimal Day as it is most known, occurred in 1971 after the pre-decimal system was deemed too complicated with pounds, shillings and pence. Initially, the plan was to make the new decimal currency into cents and dollars (known more in the USA), but this was reconsidered, and pounds and pence were the chosen coinage.

The 2023 Queen Elizabeth II Memorial Gold Prestige Sovereign Proof Set
The 2022 Prince William 40th Birthday Gold Prestige Infill Sovereign Set