Smart Lock Night Latch and Secondary Lock Guide¶
Guide to using smart locks alongside night latches and secondary locks on UK doors covering dual-lock configurations, sequential access, insurance implications, and best practices for multi-lock doors.
Secondary Lock Configurations with Smart Locks¶
Guide to using smart locks alongside night latches and secondary locks on UK doors covering dual-lock configurations, sequential access, insurance implications, and best practices for multi-lock doors.
Dual-Lock Automation and Usage Patterns¶
Guide to using smart locks alongside night latches and secondary locks on UK doors covering dual-lock configurations, sequential access, insurance implications, and best practices for multi-lock doors.
Specifications and Comparison¶
| Configuration | Primary Lock | Secondary Lock | Automation Level | Insurance |
|---|---|---|---|---|
| Smart lock replaces night latch | Yale Conexis L1 | None (integrated) | Full smart automation | Check TS 007 compliance |
| Smart lock + existing night latch | Nuki Smart Lock | Yale night latch | Smart primary, manual secondary | Dual-lock compliant |
| Smart lock + mortise deadlock | Nuki Key Turn | 5-lever BS 3621 | Smart primary, independent | BS 3621 compliant |
| Dual smart locks | Two smart mortise locks | Synchronised via app | Full automation both locks | Check insurer |
| Smart lock + rim lock | Smart escutcheon | Rim auto-lock | Partial automation | Check compatibility |
FAQ¶
- Can I use a smart lock and keep my existing night latch?
- Yes - the smart lock replaces the euro cylinder while your night latch remains functional. Some insurance policies require both locks.
- Will a night latch conflict with smart lock operation?
- No - they operate independently. The night latch is usually retracted during the day and engaged at night. The smart lock works regardless of night latch position.
- Does adding a second lock affect home insurance?
- Two locks are generally better for insurance. Check your policy wording - some require both a deadlock and additional locking device. Smart locks can count as the deadlock. For more information see our Smart Lock Weatherproofing and IP Ratings Guide.
Last updated: 2026-05-31.
Related Guides¶
- Smart-Locks Overview
- Smart Lock Weatherproofing and IP Ratings Guide
- Smart Lock Family Access Schedules Guide
External Resources¶
For further information consult authority guidelines at the Electrical Safety First.