From 59-62 he commanded in Britain, and, after a severe defeat, finally crushed the Iceni under Boadicea (Boudicca).
The alliance was of value to Claudius, for the territory of the Iceni (Norfolk, Suffolk, and Cambridgeshire) lay immediately north of the new province and its capital town Colchester, and Prasutagus had loyally kept faith with Rome.
Fearing that worse might follow when the kingdom should be annexed, and encouraged by the absence of the legate and his legions, the Iceni, led by Prasutagus's daughter Boudicca (Boadicea) rose in revolt and were joined by the Trinobantes in Essex, who had been long subject to Rome and had their own grievances to redress.
Her husband Prasutagus ruled the Iceni (in what is now Norfolk) as an autonomous prince under Roman suzerainty.
But the scantiness of Romano-British remains in Norfolk may be due to the severity with which the Iceni were crushed.
