Best smart locks UK (2026)

A genuinely useful way to add smart control while keeping your existing mechanical lock and key in place, but it doesn't add insurance-rated security itself — Yale's own recommended companion cylinder is TS007 3-star rated, a different standard from the BS3621 most insurers ask for, so check the small print rather than assume.

Best for Homeowners who want to add app and PIN access to an existing UK cylinder lock without swapping out their current deadlock.

• Retrofits onto your existing cylinder with no locksmith drilling required
• Mechanical key keeps working as a backup at all times

• Sold via an Amazon Marketplace seller (Rarewaves) rather than dispatched by Amazon directly, so it's worth checking return terms
• Battery life is 'up to' 6 months and varies with usage and signal, not a fixed figure
• Doesn't itself carry a BS3621 rating — the companion cylinder Yale suggests is a different (TS007 3-star) standard

Who shouldn't buy it: Skip this if you need a lock that is itself BS3621-insurance-rated; check your existing deadlock's own certification instead, since the Linus L2 doesn't add one.

A full handle replacement that's genuinely BSI-tested to its own standard, TS621:2018, with a tamper alarm and PIN lockout as useful extras. But TS621 is a smart-lock-specific standard, not the BS3621 mortice deadlock standard insurers usually name, so it isn't an automatic insurance tick.

Best for Households wanting to replace their entire door handle with a keyless smart handle rather than just adding an actuator.

• Replaces the whole nightlatch/handle assembly rather than just adding an actuator
• BSI-tested to TS621:2018 with a tamper alarm and lockout after repeated wrong PIN entries
• Works via Bluetooth from your phone without needing a separate hub

• Each finish is a separate option, with its own ASIN, on the same Amazon listing; our link opens on Polished Brass (SD-L1000-PB), so check the finish selected before you buy
• TS621:2018 is a different BSI standard from BS3621 and isn't confirmed to satisfy insurer wording that specifically names BS3621
• Runs on 4 x AA batteries rather than a rechargeable pack

Who shouldn't buy it: Skip this if you'd rather keep your existing mechanical handle in place; this replaces it entirely, which is more work to fit than a clip-on retrofit unit.

Nuki's entry-level retrofit lock clamps over the thumbturn you already have, so the cylinder and its key stay exactly as they were. This Amazon bundle includes the Nuki Keypad for PIN entry. It runs on four AA batteries rather than a rechargeable pack, and Nuki lists remote access as a separate purchase, where the Pro it replaces on our pages had Wi-Fi built in.

Best for Adding app and keypad entry to an existing door lock without changing the cylinder, at Nuki's lowest price.

• Clamps over the existing lock with no drilling and no cylinder change, so the key you have still works
• Nuki Keypad included in this bundle, storing up to 200 codes for family, guests or a cleaner
• Runs on replaceable AA batteries, and works with Apple Home, Alexa, Google Home and SmartThings

• Nuki lists remote access as a separate purchase, so unlocking from away takes more than the lock and keypad
• One locking speed and a larger body (110 x 60 x 60 mm) than Nuki's compact 5th-generation Pro

Who shouldn't buy it: You want to unlock the door while you're away without buying anything else: Nuki lists remote access for the Go as a separate purchase. Check your cylinder against Nuki's own compatibility guide before buying.

The cheapest lock in this line-up, and the 9V backup override is a sensible touch, but it's genuinely an accessory — you supply your own nightlatch, and the insurance-relevant rating rests entirely on that separate purchase, not this unit.

Best for Budget buyers who already have, or are happy to separately buy, a 60mm-backset nightlatch and just want PIN-code entry added.

• Lowest price point in this comparison
• 9V backup battery connection if the main 4 x AA batteries fail
• Touchscreen PIN plus Key Tag/Fob options for household members

• The nightlatch is sold separately, so you're buying an accessory, not a complete lock
• No BS3621 or insurance-approval claim of its own, so the paired nightlatch's certification is what matters to your insurer
• Price varies notably by finish, so check the one you want

Who shouldn't buy it: Skip this if you want a single product that is itself the door lock; you'll need to source and fit a compatible 60mm-backset nightlatch separately.

Technically the most capable Nuki we compare, with integrated WiFi, Matter support and a genuinely fast two-hour recharge — but installing it means physically swapping your existing door cylinder for Nuki's own Universal Cylinder, which carries no BS3621 or Sold Secure rating of its own, so it needs a clear-eyed insurance check that the clamp-on Nuki Smart Lock Go doesn't.

Best for Buyers wanting the most integrated Nuki experience (built-in WiFi and Matter) who are happy to replace their cylinder entirely and check BS3621 compliance separately.

• Built-in WiFi and Matter support without needing a separate bridge
• Recharges fully in around two hours via the included magnetic cable
• Works with the optional Keypad 2.0 for fingerprint or PIN entry

• Replaces your existing door cylinder rather than clamping onto it, so any BS3621-rated lock you currently have is removed, not left in place
• Nuki makes no BS3621 or Sold Secure claim for the Universal Cylinder that comes with it
• The most expensive lock in this comparison

Who shouldn't buy it: Skip this if you need to keep a BS3621-rated cylinder in place for your insurance; look at the Nuki Smart Lock Go instead, which clamps onto your existing cylinder without replacing it, or Nuki's separate Ultion-cylinder bundle if you want BS3621 compliance built in.

Fingerprint access for up to 50 users and a 9V backup supply are useful multipoint-door-specific features, and it's tested to PSTI, the UK's product security standard for connected devices. But stock across every UK retailer we checked was unusually patchy at time of writing, so treat availability as unconfirmed until you've checked directly with a retailer.

Best for Households with a UPVC or composite front door on a multipoint lock who specifically want fingerprint entry on the handle itself.

• Fingerprint recognition for up to 50 users plus two encrypted key cards included
• Tested to PSTI, the UK's product security standard for connected devices, and GDPR compliant per the manufacturer
• 9V backup power supply if the main batteries fail

• Stock was inconsistent across every UK channel checked, sold out direct from the manufacturer, listed as discontinued by one retailer, and unavailable on the sourced Amazon listing, so confirm availability before you commit
• Replaces only the door handle, not the multipoint lock's gearbox or cylinder, so the insurance-relevant mechanism is whichever is already fitted
• Batteries are not included in the box

Who shouldn't buy it: Skip this for now if you need something you can buy and fit this week; check stock directly with a retailer first, since availability was patchy across every UK channel at time of writing.