I wonder if this is the town where the uprising first occurred. If so, it was probably overrun and sacked by Boudicca's rebels.
These Roman towns were often settled by Roman veterans and their families. In one town, the Romans gathered in the temple to await relief or to find succor from the Gods. The rebels burnt the temple down over their heads. Should be some charred remains if this is the town.
Perhaps worth a look. OTOH, it's possible that the foundations at the site were swept up and rebuilt.