Alba
The ruler of Alba was King Constantine I (Constantine the Wine-Bountiful), who had ruled since 862 and would continue to do so until 877.
Gwynedd
This year was the last year of the rule of King Rhodri ap Merfyn (Rhodri the Great).
Mercia
The ruler of Mercia was King Burgræd, who had ruled since 842 and would continue to do so until 874.
Strathclyde
The ruler of Strathclyde at this time was likely to have been King Rhun map Arthgal.
Wessex
The ruler of Wessex was King Ælfræd (Alfred the Great), who had ruled since 871 and would continue to do so until 899.