A proposal by the Central Electricity Generating Board to construct a pressurized water reactor nuclear power station at Sizewell, Suffolk.

Inquiry into the unauthorised disclosure of information relating to the Budget

The Dawn Sturgess Inquiry is an independent investigation into the circumstances surrounding the 2018 Novichok poisoning incident in Salisbury, focusing on the death of Dawn Sturgess.

The Edinburgh Tram Inquiry investigated the delays, cost overruns, and reduced scope of the Edinburgh Trams project, ultimately providing 24 recommendations to prevent similar failures in future infrastructure projects

The Holyrood Inquiry, chaired by Lord Fraser of Carmyllie, investigated the significant cost overruns and delays in the construction of the Scottish Parliament Building. Lasting approximately 24 months, the inquiry made 31 recommendations to improve project management, financial oversight, and procurement processes for future projects.

The Independent Public Inquiry into the Non-Domestic Renewable Heat Incentive (RHI) Scheme, chaired by Sir Patrick Coghlin, investigated the serious flaws and administrative failings that led to the scheme's significant financial overspend and misuse. The inquiry, which lasted approximately 24 months, resulted in 44 recommendations aimed at preventing similar issues in future government schemes.

The Sierra Leone Arms Investigation was an independent inquiry led by Sir Thomas Legg to investigate arms trading activities in Sierra Leone during its civil war.

To investigate the role of ministers and Parliament in the approval of arms exports to Iraq during the 1980s

The Hammond Inquiry into Ministerial Conduct Relating to the Hinduja Affair, chaired by Sir Anthony Hammond, was a brief investigation lasting 45 days in 2001, which produced 9 recommendations addressing the conduct of ministers involved in the affair.