with the 4th-century fort. However it has since been found to have been associated with a large courtyard building, possibly an important residence or maybe a 'mansio' within the vicus area, demolished to make way for the 4th-century construction.

The fort underwent a few more extensions, and at its largest area it was 9 - 10 acres. The evidence suggests that the fort remained active up to the end of Roman occupation of Britain in the early 5th century.