LPS 1175: Issue 7 vs Issue 8 & Attack Testing Explained

Protect your premises with independently certified, insurance-recognised security. This guide explains what LPS 1175 is, how Issue 8 differs from Issue 7, and what attack testing actually involves—so you can specify the right door, shutter or grille with confidence.

Key takeaways (quick read)

• LPS 1175 is the industry benchmark for intruder-resistant products, set by the Loss Prevention Certification Board (LPCB/BRE) and recognised by insurers, police and specifiers.
• Issue 8 (Jan 2019–present) moved from single “SR” levels to a two-part code: Tool Category (A–H) + Delay Time (1–20 minutes)—a more realistic, layered security model.
• Issue 7 (legacy) used SR1–SR8 (higher number = higher resistance). You’ll still see SR ratings on legacy or mixed-standard product ranges.
• Typical equivalences used across the industry include: SR1 ≈ A1 and SR2 ≈ B3; SR4 is often referenced as ≈ D10. Always check the product’s official certificate. 
   

What is LPS 1175?

LPS 1175 sets out the requirements and test procedures for physical security products (doors, shutters, grilles, enclosures, fencing) to resist forced entry. Products are tested by BRE/LPCB and listed when they meet the required performance. That’s why insurers and police prefer or require LPS 1175 for higher-risk sites. 
 

Issue 7 vs Issue 8 (What changed?)

Issue 7 (SR1–SR8)

• Straightforward Security Ratings (SR1–SR8) tied to progressively more capable tools and defined working times.
• Still widely recognised on legacy products and specs. 
   

LPS 1175 Issue 8 (A1–H20)

Two-part classification:

• Letter (A–H) = tool set and number of attackers.
• Number (1–20) = minimum delay time (minutes) achieved under test.
• Designed to support layered security (combine products to slow attackers through multiple barriers). 
   

Example: B3 means the product resisted Category B tools for at least 3 minutes. A1 is the entry level; higher letters and numbers mean tougher tools and/or longer delays. 
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How attack testing works

During an LPCB test, trained testers attempt a break-in using a defined toolkit (matching the rating sought) for a measured working time. The outcome is the certified rating. Issue 7 used SR1–SR8; Issue 8 records both tools and time, which more closely mirrors real-world threats—from opportunists with simple hand tools up to determined attackers with heavier kit. 
 

Quick equivalence guide (helpful when migrating specs)

Notes: These mappings are widely used in manufacturer literature and spec guidance, but the precise performance of any product is what’s printed on its latest LPCB certificate. Always verify the exact A–H / 1–20 code for compliance.

Choosing the right rating (by risk)

• Low risk / opportunist (staff entrances, internal zones): aim A1–B3 (Issue 8) or SR1–SR2 (Issue 7 legacy).
• Medium risk / determined (loading bays, exposed shopfronts): consider C5–D10 (or SR3–SR4 legacy).
• High risk / critical assets: confirm with your insurer and specifier; choose higher tool categories and longer delays, and use layered barriers (e.g., shutter + door). 
   

Certified product examples (Security Direct)

• A1 (SR1) entry level: Intimidator Industrial Door – LPS 1175 Issue 8 A1 (SR1) for resistance to opportunistic tools.
• B3 (SR2) medium risk: Industrial Steel Roller Shutter – LPS1175 Security Level 2 – Independently tested to Issue 8 B3 (SR2).
• B3 (SR2) compact: Ultra Compact Aluminium Shutter – Issue 8 B3 (SR2) with reinforced guides and anti-lift.
• Higher resistance: LPS1175 Security Rated Steel Doors available from SR1–SR6 / A–F categories (varies by model/spec). 
   

FAQs for LPS 1175 Attack Testing

Is Issue 7 still valid?

Yes—many products retain valid Issue 7 (SR) certifications. For newly tested products, Issue 8 applies. 
 

Why did Issue 8 change the system?

To reflect real-world attacks more closely and to encourage layered security by specifying both tools and delay time. 
 

What does “B3” or “D10” mean?

Letter = tool category; number = minutes resisted. So B3 = Category B tools for 3 minutes; D10 = Category D tools for 10 minutes. 
 

How do I convert SR ratings to Issue 8?

There isn’t a perfect one-to-one conversion for all cases. Common references include SR1 ≈ A1, SR2 ≈ B3, SR4 ≈ D10—but always check the product’s latest LPCB listing. 
 

Next steps & how we help

Get a tailored recommendation for your site risk and insurance requirements.

Request certificates and product data sheets for your records.

Combine barriers (e.g., shutter + door) to extend delay time and improve real-world protection.