Asylum burial site found amid Crossrail dig
8 August 2013 Last updated at 17:53 BST
Archaeologists have uncovered one of the biggest burial sites ever to be found in London, and it's on the building site of a new train line.
The site contains thousands of skeletons. Many are thought to come from a 16th century mental asylum.
The bones were discovered at one of the construction sites of the new Crossrail network, which will create a faster route from west to east London.
Ayshea Buksh reports.