During this period Wessex continued its gradual advance to the west, overwhelming the British kingdom of Dumnonia.

Similarly Cornwall was a British kingdom before it became an English county.

It was located south of the other northern British kingdoms, and well east of present-day Wales, but managed to survive into the early 7th century.

There was probably a pre-Saxon British kingdom in this area, but this is uncertain.

Various British kingdoms existed at some point in the period.

Edwin annexed the minor British kingdom of Elmet following a campaign in either 616 or 626.

Following the withdrawal of the legions, the defenses of the British (Celtic) kingdom suffered.

She also links Gwyddno with the northern British kingdoms, not Wales.

The masque had, as its theme, the vision of a unified British kingdom under the guidance of a wise king.

However, the lands to the south and east of this waste, were controlled by smaller, nameless British kingdoms.