Crossrail reveals more of London's hidden history
3 July 2014 Last updated at 15:00 BST
Significant archaeological finds have been unearthed by a series of new London railway lines and station improvements.
Crossrail estimates that 3,000 skeletons could be found under the new Liverpool Street station development.
BBC London's Jean MacKenzie has spoken to archaeologists Peter Moore and Kasia Olchowska, Roy Stephenson from the Museum of London and volunteer Christina White.