Two “extremely important” gold coins that shed light on a little-known rebel Roman emperor from the 3rd century AD have been unearthed by a farmer in the Nottinghamshire and Derbyshire area. They relate to the Roman commander Carausius, who declared himself Emperor of Britain around 286 or 287 after the Emperor in Rome ordered his execution. He was overthrown in a coup d’état by his finance minister, Allectus, in 293.

The coins were handed in to the Portable Antiquities Scheme and moved to the British Museum. The scheme is facing a freeze in funding, despite recording more than 314,000 discoveries that have revealed many new archaeological sites. The farmer’s identity is not being revealed because archaeologists are to explore the site.