EICR Failed Due to Missing Gas Bonding (C2 Fault Explained with Real London Example – 2025 Guide)

Are you a homeowner, landlord, or business owner in London? Ensuring the safety and compliance of your property’s electrical installations is crucial, and that’s where an Electrical Installation Condition Report (EICR) certificate comes in. But, how do you obtain one? Our step-by-step guide provides all the information you need to follow to get your EICR certificate. From finding a qualified electrician to scheduling the inspection and addressing any issues highlighted in the report, our guide covers everything you need to know. Don’t risk the safety of your property – read our guide and obtain your EICR certificate today!

EICR Failed Due to Missing Gas Bonding (C2 Fault Explained with Real London Example – 2025 Guide)

EICR Certificate

27 October 2025

EICR Faults & Failures

Home Archive by category "EICR Faults & Failures"

EICR Failed Due to Missing Gas Bonding

Has your EICR report failed because of missing gas bonding?
You’re not alone it’s one of the top C2 faults flagged by electricians across London. Whether you own a rental flat in Canary Wharf or a Victorian terrace in Fulham, this small oversight can stop your Electrical Installation Condition Report (EICR) from passing.

In this 2025 guide, we explain exactly what a C2 gas bonding fault means, why it happens, how to fix it, and how to get your certificate reissued.
We’ll also show you how this issue links to other common EICR failures landlords and homeowners face every day.

👉 For full context, see our EICR Services in London and learn how our team helps hundreds of properties pass safely each month.

Real London Example – EICR Failed Due to Missing Gas Bonding

During one of our recent inspections, a landlord’s report included this note:

C2 – No independence 10mm bonding cable to gas meter.

That single line caused the entire EICR to be marked as “unsatisfactory.”
The property’s water bonding was in place, but the gas pipe had no bonding conductor connecting it to the main earth terminal at the consumer unit.

In practical terms, this meant that if an electrical fault occurred on a nearby appliance, the metal gas pipe could become live presenting a serious risk of electric shock.

This kind of fault is extremely common and often discovered during routine EICR testing in London.

💡 See other examples in our related post: Most Common EICR Failures in London (2025 Guide)

What Is Gas Bonding and Why It’s Important

Gas bonding (or main protective bonding) links your gas pipework to your electrical system’s main earth terminal using a 10 mm² copper cable.
This equalizes potential differences between conductive materials in your property, ensuring that in the event of a fault, current flows safely to earth not through you.

Without it:

Your gas pipes could become live during a fault.
A small shock could escalate into serious injury.
Your insurance or compliance documents could be invalidated.

This requirement comes directly from BS 7671 (IET Wiring Regulations) and applies to all UK properties.

For a deeper understanding of bonding and how it’s checked, visit:
👉 How to Read and Understand an EICR Report

Why Missing Gas Bonding Is a C2 Fault

A C2 fault means “potentially dangerous urgent remedial action required.”
It’s not immediately life-threatening (like a C1), but it does present a real risk if another fault occurs.

Under Regulation 411.3.1.2 of BS 7671, all metal parts that could introduce earth potential including gas pipes must be bonded to the main earth terminal.
When missing, your EICR will automatically fail and be labeled as “unsatisfactory.”

This fault commonly appears alongside other C2 issues like:

No RCD protection on sockets or lighting circuits
Missing SPD (Surge Protective Device)
Non-IP rated bathroom lights
Broken sockets or exposed conductors

See full examples in our guide:
👉 EICR Certificate Cost Explained: What to Expect in London 2025

How to Fix Missing Gas Bonding (Step-by-Step)

Repairing a missing bonding connection is simple but must be done by a qualified electrician.

Assessment: Identify where the gas meter is located and check for a connection to the main earthing terminal.
Cable Route Planning: Run a 10mm² green/yellow bonding cable from the gas meter to the consumer unit.
Installation: Attach a BS951 bonding clamp before the flexible pipe section, clearly labeled “Safety Electrical Connection – Do Not Remove.”
Testing: Verify continuity between gas pipe and main earth terminal.
Certification: Re-issue an updated satisfactory EICR.

You can learn more about this process on our EICR Remedial Work page.

How Much Does It Cost to Fix Missing Gas Bonding in London?

In most London homes, repairing missing bonding costs between £80 and £150, depending on access.
This includes:

10mm bonding cable
Bonding clamp and label
Continuity test and reissue of report

Combine this fix with your EICR visit to save time and money learn more in our EICR Certificate Cost Guide.

Landlord and Homeowner Obligations

For landlords, this issue is more than just a technical failure it’s a legal compliance matter.

Under the Electrical Safety Standards in the Private Rented Sector (England) Regulations 2020, landlords must ensure:

A valid EICR certificate every 5 years.
Any C1 or C2 faults are rectified within 28 days.
Proof of repair and a satisfactory report are provided to tenants and local authorities.

See details at:
👉 EICR Certificates for Landlords in London

Homeowners also benefit from periodic testing to maintain property safety and insurance validity:
👉 EICR Certificates for Homeowners

Preventing Future EICR Failures

Avoid bonding faults and other C2 issues by following these steps:

Schedule periodic EICR testing every 5 years.
Check visible bonding at gas and water meters.
Hire only NICEIC-approved electricians from trusted providers.
Book combined testing (EICR + PAT) for complete coverage.

Our team handles all of this through our EICR Services ensuring your property remains compliant and safe.

Conclusion

Missing gas bonding is one of the most common EICR failures in London, yet one of the easiest to fix.
By understanding what it means and acting quickly, you’ll protect your property, tenants, and electrical safety compliance.

Stay proactive schedule your inspection today with
👉 London EICR Certificates your trusted partner for safe, compliant, and fully insured EICR inspections across London.

Frequently Asked Questions About Missing Gas Bonding and EICR Failures

1️⃣Why does my EICR report say “No bonding to gas meter”?

This means your gas pipework isn’t connected to the main electrical earth using a 10mm green/yellow bonding cable. Without this, your gas pipe could become live during an electrical fault, so your EICR fails with a C2 classification. You can learn how electricians fix this issue here: 👉 EICR Remedial Work for Failed Certificates

2️⃣Is missing gas bonding an automatic EICR fail?

Yes. Missing gas bonding is a C2 fault, which automatically makes your EICR “unsatisfactory.” You’ll need to correct it and have the installation retested to get a valid EICR certificate.

3️⃣How much does it cost to install gas bonding in London?

On average, adding or repairing gas bonding costs between £80 and £150, depending on access. It’s one of the most affordable EICR remedial works. Check our full price breakdown: 👉 EICR Certificate Cost Guide

4️⃣What size cable should be used for gas bonding?

UK regulations require a 10mm² green/yellow copper bonding cable for gas and water pipes, connected using a BS951 clamp and labeled “Safety Electrical Connection – Do Not Remove.”

5️⃣My gas meter is outside do I still need bonding?

Yes. The bonding connection must be made inside your property, on the consumer side of the gas meter, before the first branch in the pipework.

6️⃣Can I fix gas bonding myself?

No gas bonding must be installed and tested by a qualified electrician. Incorrect bonding can be dangerous and will still fail your next EICR inspection.

7️⃣ What happens after I fix missing gas bonding?

Once your electrician installs proper gas bonding, they’ll retest continuity and issue an updated EICR report marked “satisfactory.” 👉 You can book this service through our EICR Services page.

8️⃣ Will my landlord insurance be affected by failed gas bonding?

Yes, potentially. Many insurers require proof of a satisfactory EICR for rental properties. If your report shows a C2 fault, you may need to fix it before your policy remains valid.

9️⃣ How can landlords prevent bonding faults in the future?

Schedule a pre-EICR inspection or visual check every few years. Our team can identify bonding and earthing issues early to ensure you pass your next inspection.

🔟What other faults commonly appear with missing gas bonding?

It’s often found alongside: No RCD protection on sockets No SPD installed in the consumer unit Broken or loose sockets Non-IP-rated bathroom lights Read more about these in our article: 👉 Most Common EICR Failures in London (2025 Guide)

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No SPD on My EICR Report? Here’s What It Means (2025/2026 London Guide)

EICR Certificate

22 October 2025

EICR Faults & Failures

Home Archive by category "EICR Faults & Failures"

No SPD on My EICR Report? Here’s What It Means

If your recent EICR (Electrical Installation Condition Report) mentions “No SPD fitted” or “C3 – Improvement Recommended,” don’t panic your certificate hasn’t failed.
In this guide, our London-based NICEIC electricians explain exactly what an SPD (Surge Protection Device) does, why it’s listed on modern EICRs, and when it actually matters for landlords and homeowners.

🔍 What Is an SPD in an EICR?

An SPD is a small protective module installed inside your consumer unit (fuse board).
Its role is to protect your electrical system and equipment from dangerous voltage surges caused by:

Lightning strikes on the power network
Sudden grid switching or transformer faults
Internal surges from large appliances (fridges, washing machines, chargers)

Without an SPD, these voltage spikes can shorten appliance life or, in extreme cases, damage wiring insulation.

📎 Related reading:
👉 EICR Services in London
👉 EICR Certificate Cost

⚙️ What Does “No SPD on EICR” Mean?

During an EICR inspection, the electrician checks whether a surge protection device is present and correctly connected.
If none is found, it is noted as:

Observation: No SPD installed – C3 Improvement Recommended

✅ C3 Means “Pass with Advice”

A C3 observation does not fail the report.
It simply means your electrical installation could be improved to meet BS 7671:2018 +A2:2022 (18th Edition Regulations).
Your EICR will still be issued as Satisfactory, but the upgrade is recommended.

📘 What Are EICR Codes (C1 – C3 + FI)?

Code	Meaning	EICR Result
C1	Danger Present – Immediate Risk	Fail
C2	Potentially Dangerous	Fail
C3	Improvement Recommended	✅ Pass
FI	Further Investigation Required	⚠️ Pending

🧾 Read next: Remedial Work for Failed EICR Certificates

⚡ Why SPDs Are Becoming Standard in 2025/2026

Since the 18th Edition A2:2022, surge protection has become a default design consideration for all new consumer units.
Electricians must install an SPD unless a documented risk assessment proves it unnecessary.

SPDs are now common because they:

Protect valuable electronics and smart-home devices
Prevent nuisance tripping and data loss
Reduce insurance claims after lightning damage
Future-proof the installation for 2025+ safety standards

🏠 Is It Illegal to Have No SPD in Your Property?

No there is no legal requirement to retrofit an SPD in existing domestic properties.
However, landlords must ensure electrical safety equivalent to modern standards under the Electrical Safety Standards in the Private Rented Sector (England) Regulations 2020.

For landlords, adding an SPD demonstrates due diligence and can prevent a later C2 re-classification when your next inspection is due.

👉 EICR Certificates for Landlords in London
👉 EICR Certificates for Homeowners in London

💰 How Much Does It Cost to Install an SPD in London?

Type of Work	Average Cost	Notes
Add SPD module to existing metal consumer unit	£90 – £130	Quick upgrade if compatible
Replace consumer unit (includes SPD + RCD protection)	£400 – £600	Recommended for older boards
New SPD installation in commercial property	£120 – £250 per board	Depends on distribution size

💡 Combine this upgrade with other remedials (bonding, RCDs, AFDDs) to save labour and testing costs.

📎 Related: EICR Certificate Cost in London

🧰 How Electricians Check SPDs During an EICR

During the test, your engineer will:

Inspect the consumer unit visually for SPD presence.
Confirm it’s correctly rated (Type 1, 2 or 3) and connected to earth.
Verify indication light = green (operational).
Record “SPD present” or “No SPD – C3 recommended.”

🔧 We include this as part of every EICR Inspection in London.

🧩 Real-World Example from a London EICR

Observation Code: C3 – No SPD fitted at consumer unit. Improvement recommended to protect equipment from overvoltage surges.

This is one of the most frequent non-critical comments our team records across Central, East and South London properties.

🧠 Should You Upgrade Now or Wait?

Upgrade now if:

Your board is older than 10 years
You’re planning remedial work anyway
The property contains expensive electronics
You manage HMOs or commercial spaces

Otherwise, it’s fine to plan it for your next scheduled maintenance.

👉 Book EICR Inspection Online

📚 SPD and the 18th Edition Regulations (BS 7671 A2:2022)

Regulation 443.4 requires SPD protection when the consequence of a surge could result in:

Serious injury or loss of life
Interruption of safety services
Significant financial or data loss

That’s why almost all new installations now include them by default.

🏢 When No SPD Can Become a C2 (Fail)

Although “No SPD” is normally a C3, some environments make it C2 – Potentially Dangerous, such as:

Fire alarm or emergency lighting circuits
Data centres and server rooms
Hospitals or care facilities
Large commercial plants

If your site falls into these categories, your EICR will be Unsatisfactory until surge protection is installed.

🔋 AFDD vs SPD – What’s the Difference?

Many clients confuse AFDDs (Arc Fault Detection Devices) with SPDs.
AFDDs prevent electrical fires from arc faults, while SPDs protect against voltage spikes.
Both are optional improvements for most domestic systems but strongly advised for safety.

📎 Related: Is No AFDD a Fail on an EICR?

🧾 What Your EICR Report Might Say

C3 – No surge protection device fitted at consumer unit. Recommendation: Install SPD in accordance with BS 7671 Reg 443.4 for improved protection against overvoltage surges.

This language reassures insurers and tenants that the system is safe, with optional improvements suggested.

🛠️ Combining SPD with Other EICR Upgrades

If your EICR also listed:

No RCD protection
Missing bonding to gas/water
Old plastic consumer unit

…then upgrading the consumer unit with an integrated SPD, RCDs, and metal enclosure is the smartest, most cost effective route.

🔗 Read:

💬 Expert Advice from London Electricians

“No SPD on your EICR isn’t a reason to worry it just shows your system was installed before surge protection became standard.
But fitting one today protects everything from chargers to servers for a fraction of the cost of damage.”
— London EICR Certificates Team

🧾 Summary Checklist

Question	Answer
Does No SPD fail an EICR?	❌ No, it’s a C3 (Improvement Recommended).
Will my certificate be Satisfactory?	✅ Yes.
Should I install one anyway?	👍 Yes – for better protection and compliance.
How much does it cost?	💷 £90 – £150 domestic average.
Who can install SPDs in London?	⚡ NICEIC-approved electricians from London EICR Certificates.

It’s Not a Fail But It’s a Smart Upgrade

If your report lists “No SPD – C3”, rest assured your electrical system is safe and compliant.
But adding surge protection today means fewer risks, fewer callouts, and future-ready compliance for 2025 and beyond.

🔧 Book a professional EICR inspection or SPD upgrade today:
👉 Book Online Now
👉 Contact Our London EICR Team

🧠 FAQs for No SPD on My EICR Report

1️⃣ What does “No SPD” mean on my EICR report?

It means your consumer unit doesn’t have a surge protection device installed. It’s not dangerous, but your electrician recommends upgrading it to meet the latest BS7671 wiring regulations.

2️⃣ Is “No SPD” a fail on an EICR certificate?

No “No SPD” is recorded as a C3 (Improvement Recommended) observation. Your report still passes as Satisfactory, but fitting one improves safety and compliance.

3️⃣ What is the purpose of an SPD in an electrical installation?

An SPD protects your electrical circuits and appliances from voltage surges caused by lightning strikes, power grid issues, or large appliances switching on and off. It helps prevent costly damage and electrical fires.

4️⃣ How much does it cost to install an SPD in London?

Installing an SPD usually costs £90 to £150, depending on your fuse board type. If you upgrade your entire consumer unit, the cost typically ranges from £400 to £600 and includes built-in SPD protection.

5️⃣ Is it mandatory to have an SPD in domestic properties?

It’s not mandatory in older homes, but all new or rewired installations under BS7671 (18th Edition A2:2022) must include SPD protection by default. For landlords, adding one shows compliance and due diligence.

6️⃣ Can my property still pass an EICR without an SPD?

Yes you’ll still receive a Satisfactory certificate as long as there are no C1 or C2 issues. “No SPD” doesn’t cause a fail; it’s just a safety recommendation.

7️⃣ How do I know if my fuse board already has an SPD?

Look for a small rectangular module near your circuit breakers, often labelled “SPD” or “Surge Protection Device.” It usually has a green indicator light when working correctly.

8️⃣ Should landlords install SPDs even if they’re optional?

Yes. It’s a smart investment for landlords because SPDs prevent surge damage to tenants’ appliances and reduce future EICR repair costs. It also shows compliance with Electrical Safety Standards 2020.

9️⃣ What happens if I ignore the C3 “No SPD” observation?

Nothing immediately your report remains valid. However, during your next inspection, not upgrading could result in more C3 notes or potentially a C2 if regulations tighten.