§ Chris Grayling
To ask the Secretary of State for Transport, Local Government and the Regions who he intends shall be liable for maintaining disused underground tunnels under PPP. 
§ Mr. Jamieson
All parts of the London underground infrastructure have been allocated to one of the three infrastructure companies that were established as subsidiaries of London Underground in April 2000. Under the PPP, the infrastructure companies will transfer to the private sector. They will continue to be responsible for maintaining and modernising the infrastructure in accordance with detailed contractual obligations. These obligations include a requirement to maintain disused underground tunnels in a safe and secure condition, and in a manner which prevents deterioration.