The National Security and Investment Act (NSI) came into force on 4 January 2022.
The Act gives the government powers to scrutinise and intervene in business transactions, such as takeovers, to protect national security, while providing businesses and investors with the certainty and transparency they need to do business in the UK.
This page provides links to guidance on the rules and the accompanying legislation.
This flowchart is to help you decide whether you need to notify the government about an acquisition.
Monetary Penalties statutory instrument - this sets out the methods for calculating business turnover in the event of the Secretary of State issuing monetary penalties for non-compliance with the National Security and Investment Act
Added NSIA annual report 2022, and a Memorandum of understanding on the operation of the National Security and Investment Act 2021.
Added National Security and Investment Act 2021: guidance on compliance and enforcement.
The NSI notification service will be unavailable from 4:00pm Sunday 20 March to 9:00am Monday 21 March 2022, due to routine maintenance work. If you have any notifications in progress they will not be affected.
The National Security and Investment notification service will not be available on Saturday 15 January 2022 between 8:00am and 9:00am while we undertake maintenance. If you have a notification in progress it won't be affected.
The National Security and Investment (NSI) Act came into force on 4 January 2022. The new rules have now started and the National Security and Investment notification service is open.
Added NSI notification service forms to provide details of the information that will be required when you submit a notification. The service goes live on 4 January 2022.