Reports into the leaning of Big Ben clock tower 2011

Request

The latest assessment report carried out by or for the Houses of Parliament into the 'leaning' of the clock tower housing Big Ben, caused by the Jubilee Line extension and other changes in ground conditions since construction.

Response

The latest reports are:

Parliamentary Works Services Directorate, Big Ben Clock Tower, Long Term Observations of the Settlement and Tilt, February 2004  

London Underground Limited, Jubilee Line Extension Project, Big Ben Clock Tower, June 2009