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What Are British Standard Locks?

British Standard locks are rigorously tested to ensure they meet high-security standards. The most common certification for locks in the UK is BS3621, which applies to mortice and cylinder locks used in external doors. Other standards include BS8621 for keyless egress locks (commonly used in apartments) and BS10621 for locks with additional security features.

A British Standard lock is easily identifiable by the BSI Kitemark (a heart-shaped symbol with a tick inside it), which is stamped on the lock or faceplate.


Types of British Standard Locks

  • BS3621 – High-Security Deadlocks
  • Commonly used in wooden doors.
  • Requires a key to lock and unlock from both sides.
  • Mandatory for many home insurance policies.
  • BS8621 – Keyless Egress Locks
  • Designed for properties where quick exit is necessary.
  • Locked from outside but features a thumb turn for internal unlocking.
  • Common in apartments and shared buildings.
  • BS10621 – Restricted Egress Locks
  • Similar to BS3621, but can be deadlocked from the outside only.
  • Often used in commercial properties for added security.

Pros of British Standard Locks

  • ✅ High-Security Assurance – Rigorously tested against drilling, picking, and forced entry, making them resistant to common burglary methods.
  • ✅ Insurance Compliance – Many insurance providers require BS3621 locks for home coverage. Without them, your policy could be void.
  • ✅ Durability & Reliability – British Standard locks are made with high-quality materials, ensuring long-lasting security.
  • ✅ Fire Safety Compliance – BS8621 and BS10621 locks ensure quick escape in emergencies, making them ideal for apartment blocks and rental properties.
  • ✅ Added Features for Security – Many British Standard locks include anti-pick, anti-drill, and anti-bump technology to prevent unauthorized access.

Cons of British Standard Locks

  • ❌ Higher Cost – British Standard locks are more expensive than non-certified locks due to higher security features and rigorous testing.
  • ❌ Installation Requirements – Some doors may need modifications or reinforcements to accommodate BS locks, adding to the installation cost.
  • ❌ Key-Operated from Both Sides (BS3621) – While this provides better security, it may be inconvenient for households needing quick exit options.

Should You Upgrade to a British Standard Lock?

If you want to increase home security, comply with insurance policies, or protect your property from break-ins, upgrading to a British Standard lock is a smart investment. These locks offer enhanced protection, reliability, and peace of mind.


Get British Standard Locks Installed Today!

At Swift Locksmith, we supply and install a wide range of BS3621, BS8621, and BS10621 locks to ensure your property meets the highest security standards.

  • 📞 Call Swift Locksmith Now for immediate assistance.
  • 📍 Serving Mile End, including surrounding locations.
  • 🔒 Secure Your Property with Certified British Standard Locks!
  • 🕒 Available 24/7 for Emergency Locksmith Services
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British Standard Nightlatch lock

British Standard Locks

Upgrade your property's security with British Standard locks. Contact us for professional installation and advice.