After the brief rule of Anlaf Cuaran in Northumbria, Eric was once more restored, probably in 950, only to be expelled again in 953 or 954, when Edred took the Northumbrian kingdom into his own hands.
The former, better known as Amlaib (Olaf) Cuaran, married the daughter of Constantine, king of Scotland, and fought at Brunanburh (938).
After the battle of Tara he had placed his half-brother Gluniarind, son of Amlaib Cuaran, in Dublin.
The power of the kingdom of Dublin had been already broken by the defeat of Amlaib Cuaran at Tara in 980, and the main result of the battle of Clontarf was to weaken the central power and to throw the whole island into a state of anarchy.
For instance, Amlaib Cuaran was formally converted in England in 942 and was baptized by Wulfhelm of Canterbury.