I just picked up a copy of the Family Chronicle (genealogy magazine in Canada) Nov/Dec 2000 which had the following acticle on page 4:
Scientists are to take DNA samples from 2,5000 British men to find out how many of them have Viking blood. The research is aimed at finding out how many Britons are descended from Vikings, and to answer questions that still surround the settlement patterns of the invaders.
Geneticist Professor David Goldstein, from University College London, will lead the 15-month study. The results will form the basis of a new BBC television series next year, BLOOD OF THE VIKINGS.
Vikings spread further and conquered more widely than the Romans, yet little is known about their time in Britain and Ireland during the Dark Ages. The scientists will attempt to discover how many of the Vikings stayed after raping and pillaging to make the British Isles their home.