Question to the Department for Transport:
To ask the Secretary of State for Transport, what recent estimate he has made of the average (a) amount and (b) proportion of the original cost estimate of overspend on major infrastructure projects.
The Department does not calculate the information requested.
Information about the Department’s projects is published annually in the Department’s Annual Report, available here:
Information can also be found in the Annual Report and Accounts of individual delivery bodies.
In addition to the Department’s own processes, financial and other relevant information about the performance of our largest projects, is published annually by the Infrastructure and Projects Authority (IPA). The latest (2019) Annual Report can be found here: