Finance
Britain to tighten investment screening for water and semiconductor sectors
Published by Global Banking & Finance Review®
Posted on March 12, 2026
2 min readLast updated: March 12, 2026
Global Banking & Finance Review®
Company
Published by Global Banking & Finance Review®
Posted on March 12, 2026
2 min readLast updated: March 12, 2026
Britain is recalibrating its National Security and Investment Act (NSIA) by adding water firms to mandatory screening, creating standalone categories for semiconductors and critical minerals, and narrowing AI oversight to high‑risk use cases.
LONDON, March 12 (Reuters) - Britain will refine its national security investment screening rules, including tightening oversight of sectors such as water and advanced semiconductors, the government said on Thursday.
Britain has laws which determine when private investment must be referred for greater scrutiny.
Government says reforms are needed to ensure the investment screening regime continues to protect against evolving national security risks.
"Off-the-shelf" systems powered by artificial intelligence to be removed from mandatory screening; focus instead on firms developing or modifying advanced AI.
Water companies will be deemed a sensitive sector and included in mandatory screening for the first time. This will cover major operators and large independent providers, not general supply chain companies.
Separate standalone categories will be created for semiconductors and critical minerals.
Government considering whether to expand the list of critical minerals.
Current rules remain in force until new secondary legislation is laid later this year.
(Reporting by Sam Tabahriti
Editing by Tomasz Janowski)
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The new rules will impact critical sectors including water companies, advanced semiconductors, and critical minerals.
The government is tightening investment screening to address evolving national security risks and better protect sensitive sectors.
Off-the-shelf AI systems will be removed from mandatory screening, with a focus instead on firms developing or modifying advanced AI.
Current rules will remain until new secondary legislation is introduced later this year.
Mandatory screening will apply to major operators and large independent water providers, but not to general supply chain companies.