2025 George Orwell Two Pound Edge Inscription Mule
Most mules are the result of using an incorrect obverse or reverse die, though very occasionally an incorrect collar die is used. A modern example of an incorrect collar die mule is the 2025 George Orwell 1984 £2 from the Royal Mint's Strike Your Own press.
On 20th January 2025 the Royal Mint changed the Strike Your Own coin design from the definitive flora design to the George Orwell 1984 design. It would appear that the Royal Mint staff did not update the blanks however, and a small number of planchets with the edge inscription IN SERVITO OMNIUM were struck with the George Orwell 1984 design. The expected edge inscription for this design was THERE WAS TRUTH AND THERE WAS UNTRUTH.
It is not yet clear how many mules were struck, but reportedly the Royal Mint staff offered to replace the mules for correctly struck coins (https://www.reddit.com/r/UKcoins/comments/1iamrc8/looks_like_rm_made_an_oopsie_on_one_of_the_strike/).