Home security in the UK is built on strict testing systems designed to ensure locks can withstand real burglary attempts such as snapping, drilling, picking, and forced entry. These standards are not just technical labels they represent the difference between basic protection and insurance-approved home security. At REMS Locksmith Leeds, we help homeowners understand and choose the right certified security solutions for their property. For expert advice or to upgrade your home security, contact us today to speak with a trusted locksmith.
For homeowners, understanding these certifications is essential when upgrading doors, windows, or full locking systems. The most common standards include TS007, BS3621, BS EN 1303, PAS 24, Secured by Design (SBD), and Sold Secure ratings.
This guide explains each standard in simple terms and helps you decide which one is right for your home.
Why UK Lock Standards Matter
Lock standards exist to ensure security products meet minimum safety and durability requirements. Without these certifications, a lock may look strong but fail under basic attack methods.
These standards help you:
- Protect your home from forced entry
- Meet insurance requirements
- Choose reliable, tested security products
- Avoid low-quality locks that fail easily
UK Lock Security Standards Comparison
| Standard | Used For | Door Type | Security Focus | Insurance Requirement |
|---|---|---|---|---|
| TS007 | Cylinder locks | uPVC / Composite | Anti-snap, anti-drill | Often required |
| BS3621 | Mortice locks | Wooden doors | Deadlock strength | Required for main doors |
| BS EN 1303 | Cylinder performance | All cylinders | Durability & testing | Recommended |
| PAS 24 | Full door/window systems | Modern doors/windows | Forced entry resistance | Recommended |
| Secured by Design | Full property security | Homes & new builds | Police-approved security | High-level projects |
| Sold Secure | Security products | Locks & hardware | Attack resistance rating | Optional but strong |
TS007 – Cylinder Lock Security Standard
TS007 is one of the most important standards for modern UK door security, especially for euro cylinder locks used in uPVC and composite doors.
It protects against:
- Lock snapping
- Drilling attacks
- Bumping techniques
- Picking attempts
TS007 star ratings:
- 1-star: Basic certified cylinder
- 2-star: Cylinder with security hardware
- 3-star: Maximum protection cylinder
Standard cylinders without TS007 protection are highly vulnerable. Most insurance providers recommend TS007-rated locks for external doors.
BS3621 – Mortice Lock Standard
BS3621 is a British Standard mainly used for mortice locks installed in wooden doors.
Key features:
- Strong deadlocking bolt system
- High resistance to forced entry
- Key-operated security mechanism
- Durability testing
Where it is used:
- Wooden front doors
- Traditional UK homes
- External timber doors
Many UK home insurance providers require BS3621 locks on main doors. Without it, claims may be affected in burglary cases.
BS EN 1303 – Cylinder Performance Standard
This standard measures the performance and durability of cylinder locks.
It tests:
- Key operation life cycle
- Corrosion resistance
- Security grading
- Physical strength
TS007 focuses on attack resistance, while BS EN 1303 ensures long-term reliability.
PAS 24 – Door and Window Security Testing
PAS 24 tests the entire door or window system, not just the lock.
It evaluates:
- Frame strength
- Lock integration
- Forced entry resistance
- Real-world attack simulation
Common use:
- uPVC doors
- Composite doors
- Modern window systems
Secured by Design (SBD)
Secured by Design is a UK Police-backed security initiative.
It covers:
- Doors
- Windows
- Locks
- Full property systems
Benefits include:
- Crime prevention focus
- High security assurance
- Often required in new housing developments
Sold Secure Ratings
Sold Secure is an independent testing body that rates security products.
Rating levels:
- Bronze: Basic protection
- Silver: Medium protection
- Gold: High security
Gold-rated products offer strong resistance against physical attacks and are ideal for high-risk areas.
Which Security Standard Do You Need
Different homes require different security levels.
Guide:
- Apartments or flats: TS007 cylinders
- Older houses: BS3621 mortice locks
- Modern homes: TS007 with PAS 24 doors
- High-risk areas: Secured by Design and Sold Secure Gold
Common Mistakes Homeowners Make
- Using non-certified cheap locks
- Ignoring cylinder security
- Not checking insurance requirements
- Upgrading handles instead of locks
- Delaying replacement of damaged locks
How to Check If Your Lock is Certified
- Look for BS or TS markings on the lock
- Check cylinder engraving
- Review product documentation
- Ask a professional locksmith
When to Call a Locksmith
- Old or damaged locks
- Difficult or stuck keys
- Insurance upgrade requirements
- New property security check
- Emergency lock issues
Professional Locksmith Support
A qualified locksmith can:
- Identify weak security points
- Upgrade locks to TS007 or BS3621 standards
- Install high-security cylinders
- Ensure insurance compliance
- Improve overall home security
Final Thoughts
UK lock security standards such as TS007, BS3621, BS EN 1303, PAS 24, Secured by Design, and Sold Secure are essential for modern home protection. Each standard serves a specific purpose, from cylinder security to full door system testing.
Choosing certified locks ensures better security, insurance compliance, and long-term peace of mind.
If your current locks do not meet these standards, upgrading them is one of the most effective steps to improve home security.