Alba
The ruler of Alba was King Constantine II (Constantine the Middle-Aged), who had ruled since 900 and would continue to do so until 943.
Gwynedd
The ruler of Gwynedd was King Idwal ab Anarawd (Idwal the Bald), who had ruled since 916 and would continue to do so until 942.
Northumbria
The ruler of Northumbria was King Ealdræd I, who had ruled since 913 and would continue to do so until 933.
Strathclyde
The ruler of Strathclyde at this time was likely to have been King Owain map Dyfnwal.
Wessex
The ruler of Wessex was King Eadweard I (Edward the Elder), who had ruled since 899 and would continue to do so until 924.