A recent find on the Portable Antiquities website is a piece of lead with the apparent incuse impression of a radiate coin of Carausius (YORYM-9875B2, found in the Parish of Cottam, to the north of Driffield, East Yorkshire).
The full PAS text is:
"An incomplete lead coin mould with an impression of Carausius, dating to c. AD 291-3.
The mould is sub-square with worn breaks across one corner. It bears a reversed impression of a radiate coin of Carausius (AD 286-293) on one side. The impression is of the obverse of the coin which shows a radiate and draped bust left surrounded by a reversed legend which reads IMP C CARAVSIVS (P F) [AVG] when in the correct orientation. The reverse is flat and undecorated.
The bust is almost certainly from the S P // - issue which dates to c. AD 291 (see RIC V.5, pp. 570-6, nos. 3241-3321 for issue). This issue has affinities with the London Mint but can be set apart; it is possibly a branch mint. One can assume that the mould would have been created between AD 291 and 293 when Carausius died.
The metal has a mid-yellow/brown patina and is worn. The object is 35.9mm long, 31.8mm wide, 4.4mm thick and weighs 29.1g.
As the object is composed of lead it could not be used for creating cast forgeries and instead may have been used to create cliche coins. This method involves placing the original, official coin between two thin sheets of metal, placing these two sheets between lead plates or leather and then hammering to create an impression on the inner plates. These impressions would then be cut out and attached together to create a version of the original coin. It is not possible to conclusively say that this object is for the production of cliche coins but it does provide one possibility.
See PAS records: SF-D11AF3, LVPL-0A5332 and WAW-013507 for comparison and also PAS record FASA-FC2B63 for an example of a probable cliche coin."