Personal security scanners are X-ray-based systems that screen individuals and their belongings at building entry points, detecting concealed weapons, explosives, and prohibited items regardless of whether they are metallic. In the UK, their role has shifted from a discretionary security measure to a practical compliance tool: since the Terrorism (Protection of Premises) Act 2025 — Martyn’s Law — received Royal Assent, organisations responsible for qualifying premises have had to demonstrate, not just assume, that their entry screening is proportionate to a documented risk assessment 1. This article sets out how personal security scanners fit into that compliance picture across offices, courts, and government buildings, where they sit relative to critical infrastructure and higher-security settings, and why they now outperform legacy screening methods on the specific grounds Martyn’s Law asks duty-holders to justify.

Martyn’s Law: The Compliance Backdrop Reshaping Entry Screening

The Home Office’s own impact assessment puts the scale of this in context: of roughly 928,000 publicly accessible premises across the UK, an estimated 178,900 fall within the scope of Martyn’s Law under the standard and enhanced tier thresholds 3. The standard tier applies to premises where between 200 and 799 people, including staff, may reasonably be expected on site at once; the enhanced tier applies from 800 upwards, alongside qualifying events with controlled entry 1. The Act received Royal Assent on 3 April 2025, the Home Office published its statutory guidance under section 27 on 15 April 2026, and enforcement — overseen by the Security Industry Authority as regulator — is expected from around April 2027, following the 24-month implementation period 2.

For enhanced tier duty-holders specifically, the obligations go beyond procedural readiness (evacuation, invacuation, lockdown, communication) into a requirement to consider public protection measures that are reasonably practicable, including monitoring of the premises, physical security measures, and protection of information that could assist an attacker 1. The statutory guidance is explicit on one point that matters directly for procurement decisions: organisations will not be judged on whether they installed a particular piece of equipment, but on whether their decision — to install it, or not to — followed a genuine risk assessment 1. A personal security scanner bought without that underlying assessment does not, on its own, satisfy the Act; a scanner selected because the assessment identified a specific, documented gap does.

Offices, Courts, and Government Buildings

Government buildings — town halls, departmental offices, courts, tribunals, and other public-facing civic premises — have carried informal screening expectations for years, but Martyn’s Law formalises the underlying logic: a responsible person must be identified, a vulnerability assessment conducted, and physical measures justified against a realistic attack scenario rather than a worst-case abstraction 1.

These premises share a common operational challenge: a mix of staff who pass through the same entrance daily and members of the public who do not, often at volumes well above the standard tier threshold. Courts and tribunal buildings in particular combine the general public, legal professionals, and, in criminal proceedings, parties with a direct incentive to bring in prohibited items — a materially different risk profile from a typical commercial office. Departmental and civic buildings face a related but distinct issue: predictable, high-volume entry at fixed times of day, where any screening bottleneck at reception itself becomes an operational and safety problem.

For office environments more broadly, particularly those with a public-facing ground floor or a shared multi-tenant reception, the calculation differs again. Security teams are balancing three things: staff and visitor experience, throughput at a single entry point, and a credible but comparatively lower-probability threat profile than a court building or ministerial department. In all of these settings, the practical requirement is the same — screening equipment and entry-point layout need to be sized to genuine daily footfall, not to an occasional peak, since a queue at the door undermines the very protective security the screening is meant to provide.

Critical Infrastructure, Schools, and Prisons: A Different Regulatory Track

It is worth being precise about scope here, because these environments do not all sit under the same rulebook. Martyn’s Law governs publicly accessible locations defined by footfall thresholds; it is not the framework that governs critical national infrastructure. Strategic sites such as power generation and distribution facilities, water treatment plants, and other designated critical infrastructure fall instead under protective security guidance issued by the National Protective Security Authority, reflecting a threat model built around sabotage and site compromise rather than crowd-facing terrorism 1. For these premises, personal security and body scanning technology typically forms part of a wider perimeter and access-control strategy, screening staff and contractors at controlled entry points rather than the general public.

Prisons and secure custodial environments occupy their own regulatory space entirely, with screening driven by prison security standards rather than Martyn’s Law. Schools sit inside Martyn’s Law scope, but the government’s own guidance and impact assessment place most schools within the standard tier by default, given typical occupancy levels — meaning the compliance bar is procedural rather than a presumption in favour of physical screening equipment 3.

We cover the specific requirements for these environments in dedicated material; the focus of this article is the office, court, and government building segment, where Martyn’s Law compliance is the primary driver behind entry screening decisions.

Why Metal Detectors and Manual Search Fall Short of Martyn’s Law Expectations

Walk-through metal detectors and manual bag searches remain the default entry method at many UK premises, and in genuinely low-footfall, low-threat environments they can still be defensible. Their limitations become material as footfall and threat complexity increase, and those limitations map directly onto the kind of gaps a Martyn’s Law risk assessment is meant to surface. Metal detectors generate high false-positive rates in any environment where visitors legitimately carry metal items — keys, belts, coins, electronic devices — forcing a choice between time-consuming manual follow-up on every alarm or a reduced sensitivity threshold that risks letting genuine threats through. By design, they also cannot detect non-metallic threats: plastic or ceramic components, ceramic-bladed weapons, and liquid or plastic explosives pass through undetected. Manual bag searches are slower still, inconsistent in quality across shifts and operators, and entirely dependent on individual training and attention span over a long duty period.

X-ray-based personal security scanners close both gaps. A personal belongings scanner produces a full image of bag contents regardless of material composition, removing the binary alarm/no-alarm limitation of metal detection. A body scanner performs the equivalent function for the person, detecting concealment on or inside the body — including non-metallic weapons, liquid and plastic explosives, and drugs — at a screening speed compatible with continuous entry flow rather than the stop-start pattern of manual searching. For premises handling incoming post or parcels, the same imaging principle extends to post and package screening, closing off a route into the building that entry-point screening alone does not cover.

How Personal Security Scanners Support Compliance in Practice

A personal security scanner deployment at an office, court, or government building entry point typically pairs two elements: screening of the person and screening of what they carry. LINEV Systems designs and manufactures both product lines, giving duty-holders a single point of specification for either or both, and a documented basis for showing how the equipment answers the specific gap identified in their risk assessment.

Body scanners. These systems screen the individual directly, detecting items concealed on or inside the body that walk-through metal detectors cannot identify by design — non-metallic weapons, plastic and liquid explosives, and other concealed threats. For courts, government buildings, and higher-footfall office environments, a stationary, non-contact body scanner allows security staff to screen visitors quickly and consistently, without the variability of manual pat-down search or the false-alarm cycle of metal detection. The range spans configurations suited to continuous daily visitor and staff screening through to higher-specification systems for premises with an elevated threat profile, shown in full in our body scanner range below.

Baggage, personal belongings, and post scanners. These systems screen bags, cases, and parcels carried through reception or delivered to a building, producing a full X-ray image regardless of material composition — closing the gap left by metal detection and manual bag checks alike. For government and office premises, this covers everything from compact units sized for a single reception lane through to higher-throughput systems for buildings with heavier visitor volumes, post room screening for incoming parcels and letters, and portable units for temporary checkpoints or additional entry points during periods of elevated risk. The full range is set out in our baggage, personal belongings, and post scanner range below.

Both lines share the same underlying approach: AI-assisted threat recognition that flags weapons, electronic components, and organic contraband directly within the X-ray image, reducing reliance on operator judgement alone and improving consistency across shifts.

What This Means for the Person Responsible for the Building

Under Martyn’s Law, the responsible person — or, for enhanced tier premises, the designated senior individual — carries accountability for demonstrating that security decisions were proportionate and reasoned, not simply that equipment was purchased 1. Regulatory scrutiny from the SIA, once its enforcement function is active from 2027, will focus on the quality of the underlying risk assessment 2. That has a direct implication for procurement: a personal security scanner should be selected against the specific threat and footfall profile of the premises, not adopted as a generic tick-box measure. Decision-makers evaluating options should be able to show why a given throughput rate and detection capability match their building’s actual risk environment, and how the equipment integrates into wider public protection procedures rather than standing alone.

LINEV Systems’ UK team works directly with facilities managers, security consultants, and duty-holders to specify body scanning and personal belongings screening solutions against this kind of documented assessment — from single-lane office reception screening through to higher-throughput deployments for courts and government buildings. For organisations currently working through their Martyn’s Law scope assessment, aligning screening technology decisions with the statutory guidance now, ahead of full enforcement, is the more defensible position to be in.

References

1. Home Office (2026) Terrorism (Protection of Premises) Act 2025: Statutory Guidance. GOV.UK. Published 15 April 2026. Available at: https://www.gov.uk/government/publications/the-terrorism-protection-of-premises-act-2025 (Accessed: 14 July 2026)

2. Home Office (2026) Martyn’s Law Factsheet. Home Office in the media, GOV.UK. Updated April 2026. Available at: https://homeofficemedia.blog.gov.uk/2025/04/03/martyns-law-factsheet/ (Accessed: 14 July 2026)

3. Home Office (2024) Terrorism (Protection of Premises) Bill: Impact Assessment. GOV.UK. Available at: https://www.gov.uk/government/publications/terrorism-protection-of-premises-bill-2024-impact-assessment/terrorism-protection-of-premises-bill-impact-assessment-accessible (Accessed: 14 July 2026)

4. Home Office (2026) Martyn’s Law Mythbuster. GOV.UK. Available at: https://assets.publishing.service.gov.uk/media/69281f35b3b9afff34e960f0/martyns-law-mythbuster.pdf (Accessed: 14 July 2026)

5. National Counter Terrorism Security Office (2026) Martyn’s Law Overview and What You Need to Know. ProtectUK. Available at: https://www.protectuk.police.uk/martyns-law/martyns-law-overview-and-what-you-need-know (Accessed: 14 July 2026)