Question to the Cabinet Office:

To ask His Majesty's Government what proportion of the Government's Major Projects Portfolio are subject to a formal evaluation of their outcomes; and whether the proportion has increased since 2020.

A review by the Prime Minister’s Implementation Unit in 2019 found that only 8% of the spending on Major Projects had robust impact evaluation plans. The Evaluation Task Force is currently undertaking a new review of evaluation in the current Government Major Projects Portfolio, which now represents £805 billion of whole-life costs, compared with £432 billion in 2019. The findings from this new review, alongside an action plan that describes how improvements will be made, is planned to be published this year.