Carausius - Augustus (usurper) of Imperium Britanniarum from AD 286 to AD 293
Marcus Aurelius Mausaeus Valerius Carausius was a military commander of the Roman Empire in the 3rd century, who usurped power in 286.

He declared himself emperor in Britain and northern Gaul (Imperium Britanniarum), only 13 years after the Gallic Empire was ended in 273.

He held power for seven years, fashioning the name "Emperor of the North" for himself, before being assassinated by his finance minister Allectus.
Carausius
Emperor (usurper) Carausius of the Britannic Empire

(1) Carausius AD 289-290
Obverse: IMP CARAVSIVS P F AVG, radiate, draped and cuirassed bust right
Reverse: PAX AVG, Pax standing left, holding olive branch and vertical sceptre; F-O across fields
Ref: RIC 101; Webb 128; S 672A; Sear 136...
(2) Carausius AD 291-293
BL Antoninianus Unknown mint
Obverse: IMP CARAVSIVS P AVG, radiate, draped and cuirassed bust right
Reverse: PROVIDE AV, Providentia standing left, holding spear and cornucopiae; C in exergue
Ref: RIC - ; Sear -
(3) Carausius AD 289-290
Obverse: IMP CARAVSIVS P F AVG, radiate, draped and cuirassed bust right
Reverse: PAX AVG, Pax standing left, holding olive branch and vertical sceptre; ML in exergue
Ref: RIC 101; Webb 128; S 672A; Sear 136...
(4) Maximian | Carausius 292-293 AD
Obverse: radiate and cuirassed bust right; IMP C MAXIMIANVS P F AVG
Reverse: Pax standing half left holding palm branch and long scepter; PAX__A_VGGG/ S_P / MLXXI
Ref: RIC V 34