Excavation of WW1 graves

Excavation has begun on a series of mass grave pits in northern France.

The pits could contain the remains of up to 400 British and Australian soldiers killed in the disastrous attack on German lines during the 1916 Battle of Fromelles.

First World War historian Peter Barton and Battlefield Archaeologist Dr Tony Pollard describe the importance of the find and explain how the excavation work will be done.