Question to the HM Treasury:

To ask the Chancellor of the Exchequer, with reference to the HM Treasury collection, Business case publications: collection, updated 13 August 2026, what plans he has to add Government Major Projects Portfolio business cases from other government departments.

Transparency of government business cases is vital for ensuring the public can hold government to account and have confidence that every pound of taxpayers’ money is being spent on projects that deliver the best possible value.

Since 11 June 2025, all projects and programmes on the Government Major Projects Portfolio (GMPP) have been required to publish a Summary Business Case, Full Business Case or Programme Business Case within 4 months of HM Treasury approval.

It is the responsibility of the relevant government departments to publish eligible business cases on gov.uk within the 4-month timeframe. As of 2nd September a total of 20 business cases have been published spanning 7 government departments.