According to the Annals of Clonmacnoise, Amlaíb had been in Britain since 940, having left another son of Gofraid, Blácaire, as ruler of Dublin.
De acordo aos Anais de Clonmacnoise, Amlaíb chegara a Gran Bretaña en 940, deixando a outro fillo de Gofraid, Blácaire, no goberno de Dublín.