His "Cumbrians" are identified with the "Welsh" of Strathclyde.
Early in the 7th century the Brythons of Strathclyde were similarly isolated by the battle of Chester .
The northern Kymry of Strathclyde were no longer formidable, and they grew less formidable as years passed on.
In the same way we might speak of the people of Strathclyde or of Northumbria in early English history.
The southern part of the kingdom of Strathclyde had for some time been under the English kings.
