Canute was succeeded by his sons, but in 1042 the native dynasty was restored with the accession of Edward the Confessor. Edward's failure to produce an heir caused a furious conflict over the succession on his death in 1066. His struggles for power against Godwin, Earl of Wessex, the claims of Canute's Scandinavian successors, and the ambitions of the Normans whom Edward introduced to English politics to bolster his own position caused each to vie for control Edward's reign. Harold Godwinson became king, in all likelihood appointed by Edward the Confessor on his deathbed and endorsed by the Witan. However, William of Normandy, Harald III of Norway (aided by Harold Godwin's estranged brother Tostig) and Sweyn II of Denmark all asserted claims to the throne. By far the strongest hereditary claim was that of Edgar the Atheling, but his youth and apparent lack of powerful supporters caused to him be passed over, and he did not play a major part in the struggles of 1066, though he was made king for a short time by the Witan after the death of Harold Godwinson.

The English under Harold Godwinson defeated and killed the Harald of Norway and Tostig and the Danish force at the Battle of Stamford Bridge, but he fell in battle against William of Normandy at the Battle of Hastings. Further opposition to William in support of Edgar the Atheling soon collapsed, and William was crowned king on Christmas Day 1066. For the next five years he faced a series of English rebellions in various parts of the country and a half-hearted Danish invasion, but he was able to subdue all resistance and establish an enduring regime.

Norman England

The Norman Conquest led to a sea-change in the history of the English state. William ordered the compilation of the Domesday Book, a survey of the entire population and their lands and property for tax purposes, which reveals that within twenty years of the conquest the English ruling class had been almost entirely dispossessed and replaced by Norman landholders, who also monopolised all senior positions in the government and the Church.

William and his nobles spoke and conducted court in Norman French, in England as well as in Normandy. The use of the Anglo-Norman language by the aristocracy endured for centuries and left an indelible mark in the development of modern English.

The English Middle Ages were characterised by civil war, international war, occasional insurrection, and widespread political intrigue amongst the aristocratic and monarchic elite. England was more than self-sufficient in cereals, dairy products, beef and mutton. The nation's international economy was based on the wool trade, in which the produce of the sheepwalks of northern England was exported to the textile cities of Flanders, where it was worked into cloth. Medieval foreign policy was as much shaped by relations with Flemish textile industry as it was by dynastic adventures in western France. An English textile industry was established in the fifteenth century, providing the basis for rapid English capital accumulation.

Henry I, also known as "Henry Beauclerc" (so named because of his education—as his older brother William was the heir apparent and thus given the practical training to be king, Henry received the alternate, formal education), worked hard to reform and stabilise the country and smooth the differences between the Anglo-Saxon and Anglo-Norman societies. The loss of his son, William Adelin, in the wreck of the White Ship in November 1120, undermined his reforms. This problem regarding succession cast a long shadow over English history.

During the confused and contested reign of Stephen, there was a major swing in the balance of power towards the feudal barons, as civil war and lawlessness broke out. In trying to appease Scottish and Welsh raiders, he handed over large tracts of land. His conflicts with his cousin The Empress Matilda (also known as Empress Maud), led to a civil war from 1139 - 1153. Matilda’s father, Henry I, had required the leading barons, ecclesiastics and officials in Normandy and England, to take an oath to accept Matilda as his heir. England was far less than enthusiastic to accept an outsider, and a woman, as their ruler. There is some evidence suggesting Henry was unsure of his own hopes and the oath to make Matilda his heir. In likelihood, Henry probably hoped Matilda would have a son and step aside as Queen Mother, making her son the next heir. Upon Henry’s death, the Norman and English barons ignored Matilda’s claim to the throne, and thus through a series of decisions, Stephen, Henry’s favourite nephew, was welcomed by many in England and Normandy as their new ruler. On December 22, 1135, Stephen was anointed king with the implicit support of the church and nation. Matilda and her own son stood for direct descent by heredity from Henry I, and she bided her time in France. In the autumn of 1139, she invaded England with her illegitimate half-brother Robert of Gloucester. Her husband, Geoffroy V of Anjou, conquered Normandy but did not cross the channel to help his wife, satisfied with Normandy and Anjou.

Stephen was captured, and his government fell. Matilda was proclaimed queen but was soon at odds with her subjects and was expelled from London. The period of insurrection and civil war that followed continued until 1148, when Matilda returned to France. Stephen effectively reigned unopposed until his death in 1154, although his hold on the throne was still uneasy.