Choosing the wrong security company in London can leave your business dangerously exposed. With hundreds of providers operating across the capital, knowing what to look for – and what to avoid – is essential. This guide walks you through every factor you need to consider before signing any security contract.
Whether you need a single security officer for a small retail shop or a full security team for a large corporate campus, the selection process should never be rushed. A professional security company with SIA-licensed officers brings expertise, accountability and peace of mind.
Why Choosing the Right Company Matters
Security is not a commodity. The quality of your security provider directly affects the safety of your staff, customers, premises and assets. A poorly vetted company may deploy untrained or unlicensed officers who create more risk than they resolve. Under the Private Security Industry Act 2001, it is a criminal offence to deploy an unlicensed security officer.
The 8 Essential Factors to Check Before You Sign
SIA Licensing – The Non-Negotiable
What to check
Every security officer deployed in the UK must hold a valid SIA licence under the Private Security Industry Act 2001. Ask any company to provide SIA licence numbers for every officer they intend to deploy. You can verify licences directly at sia.homeoffice.gov.uk.
Why it matters
Deploying an unlicensed security officer is a criminal offence under UK law. If a company cannot immediately confirm valid SIA licensing for all staff, walk away. Every GM Secure officer holds a current, valid SIA licence with no exceptions.
Professional Standards & Proven Track Record
What to check
Look for companies with a proven track record. Ask how long they have been in operation, whether they work with other security companies as trusted subcontractors, and what client testimonials they can provide.
Why it matters
A company trusted to supply officers to other established security firms has demonstrated reliability in the most demanding way possible. GM Secure is already trusted by other security companies across London as a preferred B2B officer supply partner.
Staff Vetting – BS 7858 & DBS Checks
What to check
Ask specifically whether the company conducts background checks on all staff in accordance with BS 7858:2019 – the British Standard for vetting security personnel – including identity verification, employment history review and DBS checks.
Why it matters
Improperly vetted officers pose a direct internal security risk to your business. BS 7858 compliance is widely regarded as the industry benchmark for security officer screening in the UK. Every GM Secure officer undergoes a full DBS check before any deployment.
Training Standards & Sector Expertise
What to check
Beyond the SIA licence, ask what ongoing training officers receive. Do they hold First Aid at Work certificates? Are they trained in conflict management and de-escalation? Do they have site-specific training for your sector?
Why it matters
A door supervisor at a licensed venue needs different skills to a concierge officer at a corporate headquarters. Specialist training makes the difference between a professional response and an incident that escalates unnecessarily.
Want to See Our Credentials?
GM Secure is happy to provide full documentation – SIA licences, vetting policy, insurance certificates and references on request. No pressure, no obligation.
Request Our Company ProfileInsurance – Public Liability & Employers’ Liability
What to check
Any professional security company must hold Public Liability Insurance and Employers’ Liability Insurance. Ask for current certificates of insurance before signing any contract and verify the policy covers the specific services you require.
Why it matters
If an officer causes injury or property damage at your site and the company is uninsured, you could face significant financial and legal consequences. GM Secure carries comprehensive insurance through Hiscox on every deployment.
Response Times & 24/7 Availability
What to check
Ask specifically: what is their emergency response time for your area of London? Can they deploy additional officers at short notice? What is their documented contingency plan if a scheduled officer cannot attend?
Why it matters
Security incidents do not follow office hours. A company that cannot be reached at 2am or cannot replace a no-show officer within hours leaves you exposed at the worst possible moment. GM Secure operates 24/7 with emergency deployment available across London and Essex.
References, Reviews & Companies House Check
What to check
Request at least two references from similar businesses in London. Check Google Reviews and verify the company’s details at Companies House to confirm they are a properly registered, actively trading company.
Why it matters
A company’s past performance is your strongest predictor of future reliability. GM Secure is registered at Companies House (No. 15623450) and has a 5-star Google rating across 500+ completed deployments.
Contract Clarity & Transparent Pricing
What to check
Read every line of the contract before signing. Look for: minimum notice period to cancel, penalty clauses, how rate increases are handled, and exactly which services are included in the quoted price.
Why it matters
Many businesses get locked into poor contracts with lengthy exit clauses. GM Secure provides clear, fully itemised quotes with no hidden charges and no pressure to sign.
Red Flags to Watch Out For
Avoid Any Company That…
- Cannot immediately produce SIA licence numbers for all officers
- Quotes significantly below market rate – this signals unlicensed or under-insured staff
- Refuses to provide references from existing London clients
- Has no verifiable registered address or Companies House number
- Cannot provide current insurance certificates within 24 hours
- Pressures you to sign a long-term contract before completing a site assessment
- Cannot explain their BS 7858 vetting procedure in detail
- Has no dedicated point of contact or 24/7 emergency number
Your Pre-Contract Checklist
Before You Sign – Confirm All of These
- SIA licence numbers verified online for all proposed officers
- Company registered and in good standing at Companies House
- BS 7858 vetting policy provided in writing
- Current insurance certificates received and reviewed
- At least two client references contacted and verified
- Emergency response time and 24/7 cover confirmed in writing
- All contract terms read and understood – especially exit clauses
- Free site assessment completed before any contract is signed
- Named point of contact assigned to your account
- Pricing fully itemised with no vague line items
About GM Secure Ltd
GM Secure Ltd – Company No. 15623450, ICO Reg ZB687885, registered in England & Wales. SIA-licensed, DBS-checked, Hiscox-insured security officers across London, Essex and the UK. Call 0794 782 2002 or email info@gmsecure.co.uk for a free, no-obligation quote.
Conclusion
Choosing the right security company in London requires proper due diligence. The 8 factors covered in this guide – SIA licensing, professional standards, BS 7858 vetting, training, insurance, response capability, track record and contract clarity – form the foundation of any trustworthy security partnership. Contact GM Secure today for your free site assessment and no-obligation quote.