ANGLO SAXONS
http://www.bbc.co.uk/education/topics/zxsbcdm
With the breakdown of Rome's control of Britain it became possible for the Angles, Saxons and Jutes from across the North Sea who had been raiding the coast of Britain for a hundred years to increase their pressure. Instead of raiding and then withdrawing, by about 450 A.D they were beginning to settle here. The invasion consisted of a series of attacks on different parts of the country over a period of years and under a number of leaders.