Randall Contracting have worked on a number of projects to remove old skeletons and bones from sites earmarked for redevelopment. It is quite a common thing to do and I  have found an article by the Musem of London which lists some of the sites in London where this has occurred, this is http://www.museumoflondon.org.uk/Collections-Research/LAARC/Centre-for-Human-Bioarchaeology/Policies/Reburialofhumanremains.htm