Anglo-Saxons were not 'vikings' ( which is a stupid term because it actually means Pirate or something like that ), some of them may have had scandinavian blood in them, as did many cultures in western/northern europe, but to generalise and say Anglo-Saxons were descendants of scandinavians is false, some people may have had scandinavian descendants, but that doesn't really have anything to do with the subject.
English is a Germanic language influenced by some outside factors, Britons resided on the Island and the Angles, Saxons and other Germanic tribes settled in the south-east of England, integration obviously occured and the bloods were mixed, the language formed and we became HARD AS NAILS SON.
Lol
Obviously Anglo-Saxons were not 'vikings' in the same sense but they did have tons of "viking blood" in them as well as Angles/Saxon blood.
The original people, Britons, who after the Romans retreated in 400AD suffered from European invasions of all kinds, the Angles came from northern Germany, Saxons from Lower Saxony, and Danes from Jutland (Back then "Jutes from the Jutland Peninsula").
They actually did a test in a Channel 4 documentary some years ago on people who thought they were
100% English, needless to say no one were and the connections to all over Europe (and global) was quite astounding, so astounding that actually people had more in common with those overseas than their next-door neighbor.
100% English (
http://www.imdb.com/title/tt0907295/)
Take eight people. All of them born in England. All of them white. All of them convinced they are 100% English. Convince them to provide a sample of their DNA. Then submit it to a series of state of the art DNA tests; and some of them will be in for a shock when they discover just how English they really are. "I was born in England. I was born English, my parents were English, my grandparents were English and their parents were English and it goes back and back, so I am English through and through," says comedian Danny Blue. A prime-minister's daughter, a peer of the realm, a tabloid journalist, a lawyer, a country lady, a trainee soldier, a stand-up comic and a woman who works in the fishing industry: all of them are convinced they come from solid Anglo-Saxon stock. With the help of cutting edge DNA analysis, 100% English reveals the secrets of their hidden origins which cover most of the globe.