How 11 million Britons are descended from troops who served at the Somme but many do not know their ancestors fought there 

New research reveals millions of us could be related to war heroes

Research commissioned as part of the centenary commemorations 

http://www.dailymail.co.uk/news/article-3661290/How-11-million-Britons-descended-troops-served-Somme-not-know-ancestors-fought-there.html