Jurisdiction(s):
United Kingdom

Related legal acts

Key definition

security definition

What does security mean? In legal practice, security means money or other assets provided as a guarantee that a legal obligation will be performed, with forfeiture if it is not. In criminal proceedings, it most often refers to a cash deposit or equivalent required as a condition of bail to secure a defendant’s attendance at court and compliance with bail; failure to surrender may lead to forfeiture. The concept and procedures are set by bail legislation and court rules in each jurisdiction. Practice varies: in England & Wales and Northern Ireland, courts commonly take recognisances, with or without sureties, and may require a...

UK National Security and Investment Act 2021: practical guide for lenders on notifications and call‑in risk across acquisitions, lending, share security (including Scots pledges), enforcement, real estate and insolvency

Published by a LexisNexis Banking & Finance expert

Practice notes

This PrACTice Note outlines the principal provisions of the National security and Investment Act 2021 (NSIA 2021) before addressing the consequences of the Act for finance transactions. The NSIA 2021 requires, in specified circumstances, a mandatory notification to the Secretary of State ahead of acquiring control of an entity, and grants the government powers to review proposed or completed acquisitions where national security issues may arise (the call-in power). The regime’s impact should be assessed on certain finance transactions, particularly when financing a purchase or taking security over assets or shares in certain sectors—see Mandatory notification below—or where the asset or entity may present national security sensitivities. The substantive provisions of the Act commenced on 4 January 2022. Note that the call-in power has retrospective effect—see What is the call-in power? below. Also note that the NSIA 2021 extends to, and applies across, the whole of the UK.

The National Security and Investment Act 2021—what does it do?

This section provides a summary of the National Security and Investment Act 2021. For more detailed information, see Practice Note: The National...

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Web page updated on 22/05/2026

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