National Security and Investment Act - statement for the purposes of section 3

Cabinet Office written statement – made am ar 21 Mai 2024.

Danfonwch hysbysiad imi am ddadleuon fel hyn

Photo of Oliver Dowden Oliver Dowden Chancellor of the Duchy of Lancaster, Secretary of State in the Cabinet Office, Deputy Prime Minister

On 18 April I published the Government’s response to the National Security and Investment (NSI) Call for Evidence, which sought feedback from stakeholders on how the Government can increase understanding of the NSI Act and the risks it seeks to address. As part of the Government’s response, I committed to publishing an updated section 3 statement setting out the factors I expect to take into account when exercising the call-in power under the NSI Act. I also committed to publish further guidance on a range of topics to help stakeholders understand how the Act works.

Today I have fulfilled both of those commitments by laying an amended section 3 statement before Parliament and publishing updates to the extensive market guidance the Government has published on

The previous version of the section 3 statement was published in November 2021, ahead of the NSI Act’s commencement. Whilst this updated version has a high degree of continuity with the previous version, several key changes have been made to better explain how the Secretary of State has used, and will continue to use, the Act’s powers.

These changes include further information on the approach the Government takes to assessing risk in relation to:

  • Trigger Events - including the circumstances in which certain acquisitions could be considered under the NSI Act, including the incorporation of new entities, formation of joint ventures, and Outward Direct Investment.
  • The targets of acquisitions - including how the Government may consider technology transfer risks when reviewing asset acquisitions.
  • Acquirers - including where the government may see risk from UK acquirers or acquirers that have previously been cleared through the NSI system.
  • The control being acquired - including how the Government may consider control risk in cases involving passive and non-controlling investments.
  • How decisions are made - including improved examples of how the Government assesses target risk, acquirer risk and control risk.

Today I have also updated the guidance for the NSI system, which is published on This includes additional guidance for higher education institutions as well as new guidance on how the Act can apply to Outward Direct Investment and how statutory timelines are calculated. A full summary of the changes is available on

I will place a copy of the updated NSI statement for the purposes of section 3 in the Libraries of the Houses.