Insurance approved locks
For a UK front timber door, the ideal locking solution should combine security, insurance compliance, and ease of use. Here's what is generally recommended and often required by insurers and security standards:
Common and Best Lock Types for a UK Timber Front Door.
Option 1: British Standard 5-lever Mortice Sashlock
- Standard: Lock for BS 3621 stamped on the faceplate – required by many UK insurers.
- Position: Used with door handles and fitted centrally in the door stile.
- You can add additional security deadlocks further down the door stile to make this configuration very secure.
Option 2: Dual locks
Lock A: British Standard 5-Lever Mortice Deadlock
- Standard: Lock for BS 3621 stamped on the faceplate – required by many UK insurers.
- Position: Usually fitted around 1 meter from the bottom of the door.
- Security: Very secure – can't be opened from outside without a key.
Lock B. Night Latch (Yale Type Lock)
- Standard: Ideally, also to BS 3621 (not all are).
- Type: Rim lock fitted on the inside of the door.
- Use: Allows keyless internal locking; often used alongside a mortice deadlock.
Varieties:
Standard Night Latch – basic security.
Auto-deadlocking night latch – higher security, prevents "credit card" opening.
Recommended Combination:
1 x BS 3621 5-lever mortice deadlock
+
1 x high-security night latch (ideally BS rated)
This provides both day-to-day convenience and nighttime or away-from-home security.
Additional Security Tips
- Hinge bolts - to prevent door removal from the hinge side.
- Door chains – for safe partial opening.
- Rack bolts - to add additional locking points when locked from the inside.
5 Lever Key Sashlock (BS certified) - Antique Brass - ALKSASH5LK25AB
Atlantic Hardware 5 Lever Key Sash lock BS3621 Certified
Available sizes;
- 2 1/2"(64mm) and 3" (76mm) case sizes.
5 Lever Key Sashlock (BS certified) - Distressed Silver - ALKSASH5LK25DS
Atlantic Hardware 5 Lever Key Sash lock BS3621 Certified
Available sizes;
- 2 1/2"(64mm) and 3" (76mm) case sizes.
5 Lever Key Sashlock (BS certified) - Matt Black - ALKSASH5LK25MB
Atlantic Hardware 5 Lever Key Sash lock BS3621 Certified
Available sizes;
- 2 1/2"(64mm) and 3" (76mm) case sizes.
5 Lever Key Sashlock (BS certified) - Matt Bronze - YKSLBS52N-MB
M Marcus 5 Lever Key Sash lock BS3621 Certified
Available sizes;
- 2 1/2"(64mm) and 3" (76mm) case sizes.
5 Lever Key Sashlock (BS certified) - Polished Brass - ALKSASH5LK25PB
Atlantic Hardware 5 Lever Key Sash lock BS3621 Certified
Available sizes;
- 2 1/2"(64mm) and 3" (76mm) case sizes.
5 Lever Key Sashlock (BS certified) - Polished Chrome - ALKSASH5LK25PC
Atlantic Hardware 5 Lever Key Sash lock BS3621 Certified
Available sizes;
- 2 1/2"(64mm) and 3" (76mm) case sizes.
5 Lever Key Sashlock (BS certified) - Satin Brass - YKSLBS52N-SB
M Marcus 5 Lever Key Sash lock BS3621 Certified
Available sizes;
- 2 1/2"(64mm) and 3" (76mm) case sizes.
5 Lever Key Sashlock (BS certified) - Satin Chrome - ALKSASH5LK25SC
Atlantic Hardware 5 Lever Key Sashlock BS3621 Certified
Available sizes;
- 2 1/2"(64mm) and 3" (76mm) case sizes.
5-Lever Key Deadlock (BS certified) - Antique Brass - ALKDEAD5LK25AB
Atlantic Hardware 5 Lever Key Deadlock BS3621 Certified
Available sizes;
- 2 1/2"(64mm) and 3" (76mm) case sizes.
5-Lever Key Deadlock (BS certified) - Dark Bronze - YKDLBS52N-MB
M Marcus 5 Lever Key Deadlock BS3621 Certified
Available sizes;
- 2 1/2"(64mm) and 3" (76mm) case sizes.
5-Lever Key Deadlock (BS certified) - Distressed Silver - ALKDEAD5LK25DS
Atlantic Hardware 5 Lever Key Deadlock BS3621 Certified
Available sizes;
- 2 1/2"(64mm) and 3" (76mm) case sizes.
5-Lever Key Deadlock (BS certified) - Matt Black - ALKDEAD5LK25MB
Atlantic Hardware 5 Lever Key Deadlock BS3621 Certified
Available sizes;
- 2 1/2"(64mm) and 3" (76mm) case sizes.
5-Lever Key Deadlock (BS certified) - Polished Brass - ALKDEAD5LK25PB
Atlantic Hardware 5 Lever Key Deadlock BS3621 Certified
Available sizes;
- 2 1/2"(64mm) and 3" (76mm) case sizes.
5-Lever Key Deadlock (BS certified) - Polished Chrome - ALKDEAD5LK25PC
Atlantic Hardware 5 Lever Key Deadlock BS3621 Certified
Available sizes;
- 2 1/2"(64mm) and 3" (76mm) case sizes.
5-Lever Key Deadlock (BS certified) - Satin Chrome - ALKDEAD5LK25SC
Atlantic Hardware 5 Lever Key Deadlock BS3621 Certified
Available sizes;
- 2 1/2"(64mm) and 3" (76mm) case sizes.
ERA 40mm High Security Nightlatch in Brass Finish - 1830-31
ERA 40mm High Security Nightlatch in Matt Black Finish - 1830-10-1
ERA 40mm High Security Nightlatch in Matt Satin Chrome Finish - 1830-35-1
ERA 40mm High Security Nightlatch in Matt Satin Nickel Finish - 1830-40-1
ERA 40mm High Security Nightlatch in Polished Chrome Finish - 1830-37-1
ERA 60mm High Security Nightlatch in Brass Finish - 1930-31
ERA 60mm High Security Nightlatch in Matt Black Finish - 1930-10-1
ERA 60mm High Security Nightlatch in Matt Satin Chrome - 1930-35-1
ERA 60mm High Security Nightlatch in Matt Satin Nickel 1930-40-1
ERA 60mm High Security Nightlatch in Polished Chrome - 1930-37-1
British Standard 5 Lever Sash Lock - ZBSS64SS
Rebate Set for BS Security Deadlock - ZBSR02SS
Rebate Set for BS Security Sashlock - ZBSR01SS
Rebate Set for Eurospec BS Security Eurocylinder Sashlock - ARB5305SSS
Rebate Set for Eurospec BS Security Sashlock - ARB5105SSS
Eurospec 5 Lever Dead Lock (BS3621) - LDB55
PVD Brass BS3621 5 Lever Sash Lock - LSB5530PVD
Satin SS BS3621 5 Lever Sash Lock - LSB5530SSS
Polished SS BS3621 5 Lever Sash Lock - LSB5530BSS
British Standard Cylinder/Turn Sashlock set - ESB5025/CT/SSS
British Standard Cylinder/Turn Deadlock set - EDB5025/CT/SSS
Euro Profile High Security Cylinder Deadlock - EDBL5025SSS
Euro Profile High Security Cylinder Sashlock - ESBL5025SSS
British Standard Cylinder Sashlock set - ESB5025SSS
British Standard Cylinder Deadlock set - EDB5025SSS
- Polished Chrome
- Satin Chrome
- Satin Nickel
- Polished Brass
- Satin Brass
- Antique Brass
- Dark Bronze
- Polished Stainless steel
- Satin Stainless steel
- Grey
- Black
