5 Common Security Mistakes Businesses Make (and How to Avoid Them)

When you run a business, you’re juggling dozens of priorities—sales, staffing, stock levels, customer satisfaction, compliance, and cash flow. It’s a lot to manage. But there’s one area that often gets pushed to the bottom of the list until it’s too late: security.

At Rossells Security Solutions, we’ve worked with businesses of all shapes and sizes for over 90 years, from small independent shops to multi-site commercial operations. In that time, we’ve seen the same mistakes crop up again and again—costing owners thousands of pounds, days of downtime, and untold stress.

The good news? Every one of these mistakes is preventable.

In this article, we’ll look at the five most common security mistakes businesses make, why they’re such a problem, and how to tackle them with practical, long-term solutions.

Mistake 1: Treating Security as a One-Time Job

We hear this a lot. The problem is that security isn’t static—threats evolve, technology advances, and your business changes over time. The alarm system that was cutting-edge ten years ago might now be vulnerable to tampering, use outdated communication methods, or simply no longer suit the way your business operates.

Why It’s a Problem

• Technology moves fast – Criminals learn how to bypass older systems, especially if they’re still using outdated wired lines or unencrypted wireless signals.

• Your premises change – New layouts, additional storage, or expanded facilities can leave blind spots.

• Compliance shifts – Insurance requirements and British Standards evolve; what was compliant before may no longer meet regulations.

How to Fix It

At Rossells, we recommend an annual security review for every business. This includes:

• Checking the condition and functionality of all equipment.

• Reviewing CCTV coverage for blind spots.

• Testing access control logs and permissions.

• Confirming alarm signalling meets insurance standards.

Upgrading doesn’t have to mean ripping everything out. We often integrate new tech with existing systems, such as adding IP cameras to an older CCTV network or upgrading alarm signalling to dual-path communication without replacing all detectors.

Pro tip: If your alarm panel is more than 7–10 years old, it’s worth investigating an upgrade—especially to a system that offers smart app control, real-time notifications, and integration with other security measures.

Mistake 2: Focusing Only on External Threats

Perimeter security is essential, but many businesses forget that risks also come from within. Internal theft, unauthorised access to sensitive areas, and overlooked health & safety hazards can be just as damaging as a break-in.

Why It’s a Problem

• Insider threats are real – The Home Office estimates that employee theft costs UK businesses billions annually.

• Access creep – Over time, employees who change roles or leave may retain keys, fobs, or passwords they no longer need.

• No audit trail – Without electronic access control, you can’t always prove who was where, when.

How to Fix It

We advise businesses to:

• Install access control systems that log entry and exit data. These can be card, fob, keypad, or biometric.

• Use internal CCTV in sensitive areas such as stockrooms, cash handling points, or data centres.

• Adopt a keyholder management policy, ensuring all keys and fobs are returned and deactivated when staff leave.

• Regularly review access permissions so only those who need entry to certain areas have it.

At Rossells, we install access control systems that integrate with your HR policies—making it easy to revoke access instantly, even if someone leaves unexpectedly.

Pro tip: If your current system still uses mechanical keys for sensitive areas, consider upgrading to electronic access control. Not only is it more secure, but it also provides an audit trail—something mechanical locks can’t do.

Mistake 3: Neglecting Cyber-Security Links to Physical Security

In today’s world, physical and digital security are linked. Smart alarms, IP CCTV, access control systems, and even intercoms often rely on network connections. If those are compromised, your physical security could be, too.

Why It’s a Problem

• Unsecured devices – Poorly configured IP cameras can be accessed remotely by hackers.

• Weak passwords – Many commercial systems are still using factory-default logins.

• No network segmentation – Security systems share the same network as staff computers, creating vulnerabilities.

How to Fix It

Rossells takes a joined-up approach to security, working alongside your IT provider to ensure:

• All connected devices have strong, unique passwords and up-to-date firmware.

• Systems use encrypted communication protocols.

• Networks are segmented, so security devices aren’t accessible from general office Wi-Fi.

Pro tip: If you have remote access to your CCTV or alarm system, make sure it’s through a secure app from a trusted manufacturer—not an open web browser link.

Mistake 4: Not Training Staff in Security Awareness

Technology is only as strong as the people using it. We’ve seen businesses invest in excellent security systems, only for them to be undermined by simple human errors.

Why It’s a Problem

• Alarm systems left unset – Staff forget to arm the system when locking up.

• Propping doors open – Fire exits or delivery bays left open for convenience.

• Sharing access credentials – Multiple staff using the same code or card, removing accountability.

How to Fix It

Rossells encourages all commercial clients to implement a security training plan that covers:

• How to arm/disarm alarm systems correctly.

• Locking procedures for all doors and windows.

• Rules for visitors and contractors.

• The importance of never sharing access credentials.

We can also provide on-site refresher training when new systems are installed or updated—ensuring everyone understands how to use them properly.

Pro tip: Make security part of your induction process for new staff, so it becomes a habit from day one.

Mistake 5: Failing to Integrate Security Systems

Running separate, standalone systems can mean missed opportunities for faster detection, easier management, and a better overall response.

Why It’s a Problem

• Slower incident response – An alarm triggers, but you can’t instantly view the camera footage linked to that zone.

• Management headaches – Multiple systems mean multiple apps, logins, and maintenance schedules.

• Data gaps – Without integration, you can’t easily cross-reference access logs with CCTV footage.

How to Fix It

Rossells specialises in integrated security solutions that bring everything into one platform. This could mean:

• Linking alarms with CCTV so that when a zone is triggered, the relevant camera feed is pulled up instantly.

• Integrating access control so that you can see video confirmation of who entered and when.

• Adding smart notifications to your phone or control room for immediate action.

Pro tip: If you already have multiple systems in place, ask about integration upgrades rather than full replacements—it can save time and money while improving protection.

The Rossells Approach to Business Security

Every business is different, so our process always starts with a full site survey. We’ll look at:

• The layout and entry points.

• The type of work you do and your operating hours.

• The value and portability of your assets.

• Your compliance needs (insurance, GDPR, industry-specific regulations).

• Any past incidents or known risks.

From there, we’ll recommend a tailored security strategy—whether that’s upgrading your alarm system, integrating CCTV and access control, or putting maintenance and training in place.

Other Security Services for Businesses

While alarms and CCTV are a big part of what we do, Rossells also offers:

• Access Control Installation & Maintenance – Card, fob, keypad, and biometric.

• Fire & Safety Solutions – Integrated fire alarms for compliance and safety.

• Perimeter & Outdoor Security – Gates, barriers, and external lighting.

• Maintenance Contracts – Proactive servicing to keep your system in top condition.

Final Word

Security isn’t just about locks and alarms—it’s about having a joined-up, proactive approach that evolves with your business.

Avoiding these five common mistakes can save you money, protect your staff and assets, and keep your business running smoothly without unexpected interruptions.

At Rossells Security Solutions, we’ve been helping Leicester businesses protect what matters most for over nine decades. Whether you’re looking for a complete system overhaul or just some honest advice, we’re here to help.

📞 Call our Leicester team on 0116 262 8899🌐 Visit us online at rossells.co.uk📍 Book a free on-site security review today