An interesting project has just hit the internet, conducted by Northumbria University, which is recruiting volunteers via a sort of crowdsource exercise. The purpose is to establish a database of people from the North East who emigrated to the Dominions and then joined up when WW1 broke out. I came across it in the Northumberland and Durham Family History Society magazine but it has apparently appeared in the Journal too.
The website is
http://dominiongeordiesinww1.co.uk