Key takeaways
· There were 454,961 SIA licence holders in the UK as of 1 April 2026, but only 757 companies hold SIA Approved Contractor status — compliance, not competition, filters most public security tenders (GOV.UK, May 2026).
· Around 70% of published public sector opportunities are open, non-framework competitions (BiP Group procurement data, May–June 2026).
· Frameworks are only 25–30% of local government opportunities by count but carry 60–82% of the value; miss an entry window and you can be locked out for three to five years (BiP Group).
· £78.1bn of contracts across 21,561 agreements return to market between July 2026 and January 2027 — those expiry dates are knowable now (BiP Group).
· Security tenders are published across thousands of separate sources; consolidating them by category and region turns an impossible search into a ten-minute daily routine.
Security Tenders UK: The Overlooked Route to Long-Term Security Contracts
Most security firms grow on private work: a retail park here, a construction site there, a run of events over the summer. It builds a business, but it rarely builds a pipeline. Margins get squeezed at renewal, and every quarter starts close to zero.
Public sector work behaves differently. A council, an NHS trust or a university buying manned guarding is buying it for three to five years, with scheduled uplifts and a formal process that rewards evidence over relationships. Yet when you tender for security services in the public sector, you often compete against a thinner field than expected — because the compliance bar filters out most of the market before price is considered. There were 454,961 SIA licence holders in the UK on 1 April 2026, while just 757 companies held Approved Contractor status (GOV.UK, May 2026).
The barrier, in other words, is rarely capability. Instead it is visibility first, and process second. This guide covers both: what a security tender is, what buyers require, how the process runs, and how to stop relevant opportunities passing you by unseen.
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What Is a Security Tender?
A security tender is a formal invitation from a public sector buyer to submit a priced, documented proposal to deliver security services — manned guarding, mobile patrols, keyholding, door supervision, CCTV monitoring, access control or event security — evaluated against published award criteria.
You are not quoting from a site walk: you are answering a written specification, and the buyer must justify the award afterwards. That difference explains most of what follows.
Who issues security tenders? Local authorities are the engine room, accounting for 39% of all published opportunities (BiP Group, May–June 2026). Beyond councils, expect NHS trusts, universities and colleges, housing associations, transport bodies, fire and police services, and central government departments. Emergency services in particular are moving quickly — notice volume more than doubled month on month, up 106% (BiP Group).
Two procedure types matter most. An open procedure lets any interested supplier submit a full bid in a single stage: more work upfront, but nobody can shut you out before you have made your case. A restricted procedure shortlists suppliers at a selection stage, then invites only those through to price and quality. Since the Procurement Act 2023 came into force in February 2025, buyers can also use a competitive flexible procedure (GOV.UK).
How Does the Security Tender Process Work, Step by Step?
The security tender process runs in four stages: finding the opportunity, evidencing compliance, writing and submitting the bid, and evaluation and award. Knowing which stage you are in tells you where effort belongs.
Finding Suitable Opportunities
This is where most firms lose before they start. Security tenders UK-wide are published by thousands of separate public bodies, each with its own portal, timetable and terminology. Higher-value notices reach the government’s Find a Tender service, but the sub-threshold guarding and patrol work best suited to a growing firm is frequently advertised locally and never appears there — which is exactly why a service researching thousands of sources and delivering matches to your inbox beats checking portals by hand. Shortlist ruthlessly once you can see the market: read the specification before you decide to bid, not after.
Meeting Security Tender Requirements
Compliance is the gate. Every officer deployed on a licensable activity must hold a valid, in-date SIA licence under the Private Security Industry Act 2001, normally valid for three years. Beyond that, buyers commonly specify:
· SIA Approved Contractor Scheme (ACS) status — voluntary in law, but effectively mandatory on many council, NHS and police contracts.
· British Standards — BS 7499:2020 for static guarding, BS 7858:2019 for staff screening and vetting, BS 7960 for door supervision, BS 7984 for keyholding and response, and BS EN 50518:2019+A1:2023 for alarm receiving centres.
· ISO certifications — ISO 9001 and ISO 14001 on most council and NHS frameworks, ISO 45001 for health and safety, and ISO 27001 where the contract involves CCTV platforms, monitoring or data-rich technology.
· Insurance and workforce terms — public and employers’ liability at the stated level, plus a clear position on TUPE and the Real Living Wage.
Consequently, the certification calendar matters as much as the bid calendar. An expired certificate at submission is a fail, however strong the method statement.
Writing and Submitting the Bid
The invitation to tender is where security contracts are won: method statements, mobilisation plan, rota modelling, vetting procedure, training matrix, social value and price. Answer the question as written, in the order asked, with evidence rather than adjectives. Social value carries a minimum 10% weighting on central government contracts under the Social Value Model (PPN 06/20), and many authorities apply it locally too.
Evaluation, Clarification and Award
Evaluators score each answer against a published matrix, may issue clarification questions, then publish an award notice naming the winner and usually the value. Always request feedback: a debrief on a lost bid is free market intelligence, and award notices tell you who is winning what, at what price, and when their contract expires.
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How Do You Tender for Security Services and Stand Out from the Field?
Winning bids answer the scored questions with specific, verifiable evidence — they are rarely the cheapest. Five habits separate consistent winners from serial runners-up, because firms win contracts through disciplined bid preparation and submission, not simply by bidding more often.
Qualify before you write. A near-miss on an unsuitable contract costs the same as a near-miss on a suitable one. Walk away from anything where you cannot evidence comparable work.
Evidence your people, not your policies. Buyers scoring how to tender for security contracts want vetting to BS 7858, licence monitoring, training hours per officer and retention rates — named, dated and auditable.
Treat social value as a scored section. Name the local apprenticeship, the Real Living Wage commitment, the measurable outcome — not a closing paragraph of intent.
Model the rota honestly and price to a margin you can deliver. Under-resourced schedules are visible to experienced evaluators, and underbidding creates a reference you cannot afford to repeat — particularly where TUPE brings transferring staff and their existing terms with it.
What Types of Security Contracts Can You Tender For?
Public security contracts divide into people-led and technology-led services; most growing firms find their foothold in the first before moving into the second.
Manned Guarding and Event Security
Manned guarding is the volume category: civic buildings, hospital sites, university estates, depots and leisure centres, tendered as single-site contracts or multi-site frameworks; some public contracts cover large estates, with the provision of security services spanning up to 100 sites for NHS Greater Glasgow, and teams may be deployed across multiple sites. This is where guarding services and manned guarding services are commonly specified. Event security sits alongside it, covering stadia, festivals and civic events, and is often bought through shorter call-off arrangements that suit a firm building its public sector track record.
CCTV Monitoring and Access Control
Technology-led work carries higher barriers and better margins, and it can include smart solutions that streamline operations as well as improve control. CCTV monitoring contracts for public space surveillance require licensed operators and, where an alarm receiving centre is involved, certification to BS EN 50518. Panic alarms are also commonly procured with electronic security technology because they are essential for emergency response systems. Lone worker protection systems and personal safety devices are also used to reduce risk for staff in higher-risk roles. Access control work — door entry, barriers, visitor management, surveillance solutions and integration with existing estate systems — increasingly appears inside wider facilities management lots rather than as standalone security tenders, which is a good reason to monitor by category rather than by job title; for example, NHS SBS is establishing a framework for security services, and similar requirements are often packaged through framework agreements.
What Does the UK Security Procurement Landscape Look Like in 2026?
Public sector tenders have been deliberately reshaped to be easier for smaller suppliers to enter, and the near-term pipeline is unusually visible. There were 527 security notices in the past year, underlining how active this market is.
The Procurement Act 2023 came into force in February 2025, consolidating multiple regulations into a single regime and introducing the central digital platform. Suppliers now register core business details once — Companies House number, accounts, connected persons and conviction history — and receive a unique Public Procurement Organisation Number rather than retyping the same information for every buyer (GOV.UK). In addition, authorities expecting to spend more than £100m in a financial year must publish a pipeline notice within 56 days of 1 April, listing contracts above £2m they expect to bring to market over the following 18 months; in practice, that gives suppliers advance notice of future opportunities before live bidding begins (Procurement Act 2023, s.93).
Transparency is improving across the funnel too, with disclosure rising from 66% at pre-market stage to 97% at award (BiP Group, May–June 2026). Meanwhile, £78.1bn of contracts across 21,561 agreements return to market between July 2026 and January 2027, including 9,104 local government contracts worth £8.12bn. That predictability changes the job: the question is no longer only “what is out now?” but “which incumbent contract expires in nine months, and am I in the buyer’s mind before the notice appears?”
How Does Supply2Gov Tenders Help You Tender for Security Services?
Supply2Gov Tenders solves the problem this article opened with: the security tenders relevant to you already exist, but no small team can see them by manually checking portals.
Coverage is the differentiator. Supply2Gov Tenders draws on the UK and Republic of Ireland’s largest database of public sector contract and award notices, researched from thousands of sources, and publishes more UK and Ireland opportunities and award notices than the government’s own national contract services.
Alerts are filtered, not firehosed. You define a profile by sector, keyword and geography — CPV code and region — so daily alerts deliver matching security contracts across manned guarding, CCTV monitoring, access control and event security, rather than everything a portal published that day.
Award notices and expiring contracts are visible too. Frameworks represent only 25–30% of local government opportunities by count but 60–82% of the value, so knowing when an incumbent’s term ends beats reacting to the notice — miss an entry window and you can be locked out for three to five years.
Entry cost is deliberately low. Coverage starts free for one local authority area of your choosing and expands to regions, individual countries or full UK and Republic of Ireland coverage on monthly or six-monthly terms, with no twelve-month commitment.
Tendering for Security Services: Frequently Asked Questions
How do I tender for security contracts?
Identify a relevant published notice, download the tender documents, complete the selection questionnaire, then submit a full priced bid answering every scored question before the deadline. Start with a small, local, open competition inside your delivery capability, and confirm your SIA, British Standard and ISO evidence is current before you begin writing.
What are the requirements for a security tender?
Expect to evidence in-date SIA licences for all deployed officers, staff screening to BS 7858, compliance with the relevant British Standard for the service (BS 7499, BS 7960, BS 7984 or BS EN 50518), ISO 9001 and often ISO 14001, 45001 and 27001, required insurance levels, financial standing, and a costed social value offer. SIA Approved Contractor status is frequently required or preferred.
What is bid security or tender security?
Tender security — sometimes called a bid bond — is a financial guarantee some buyers require to ensure a bidder honours its bid if selected. Common in international and major construction procurement, it is rare in UK public sector security services tenders, where financial standing checks and parent company guarantees are used instead. It is unrelated to the security services being purchased.
Building a Steady Pipeline of Security Contracts
Public sector security work is not a closed shop. Around seven in ten opportunities are open competitions, £78.1bn of contracts return to market in the next six months, and the compliance bar that makes bidding feel daunting is the same bar that thins the field once you clear it.
Three things decide whether you benefit: understand the process, meet the accreditation standard and evidence it properly, and never let a relevant opportunity pass unseen. The first two are down to discipline; the third is a visibility problem, and it is solvable today.
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