Excavating tunnels from World War I


Four miles of tunnels which were dug during World War I in the Somme battlefield are now being excavated by a team of British and French archaeologists.

Some of them are up to 100ft (30m) below the ground. Robert Hall is in the village of La Boisselle, in France, with the details.

Copyright © 2015 BBC. The BBC is not responsible for the content of external sites. Read more.

This page is best viewed in an up-to-date web browser with style sheets (CSS) enabled. While you will be able to view the content of this page in your current browser, you will not be able to get the full visual experience. Please consider upgrading your browser software or enabling style sheets (CSS) if you are able to do so.