What really interests people when smart locks are brought up is when the conversation shifts to insurance. When selling smart locks, product pages completely ignore insurance and deflect. But that is actually what is important, and what ultimately matters.
First, you have to see what type of lock your front door already has. Most UK houses that were built since the mid 2000s have a Euro cylinder lock, which on a composite door or uPVC door with a multipoint lock system, is often hidden behind the handle and when the handle is pushed down, they have three to five locking bolts. Older, wooden doors, would have a mortice lock or a more traditional Yale lock, and this actually does make a difference for insurance claims.
The best retrofit smart locks on the market for Euro cylinder systems are the ones that clip over your lock cylinder thumbturn. The smart lock stays on top of your cylinder, and your insurance won’t be affected, so in a way, this option actually does erase the conversation with your insurance.
Replacing the cylinder altogether is different. For many of the replacement models certified to the UK Security standard (TS007) or (SS312 Diamond), there are many imported models that do not have certification, and in fact, have never been tested to UK doors.
1 – When you are checking for certification on a product page, do not mistake “bank-level encryption” for UK certification.
- Have your insurer confirm in writing that fitment of the smart lock is acceptable to them, prior to making any fitment.
- For the time being, store the old cylinder, as you may need to show what was there initially.
Wooden doors are another issue. Most UK policies expect a BS3621 five-lever mortice deadlock on this type of door, and BS3621 is a different standard from anything a Euro cylinder lock is tested against. The two cannot be interchanged, regardless of any listing. Most of the time there is a sensible layout to these doors, and that is to have the BS3621 mortice lock remain the primary security, and to have a smart lock installed as a convenience secondary lock, as opposed to replacing the mortice lock altogether.
The risk to the insurance isn’t really about whether smart locks are secure. Quality, reputable smart locks are likely more secure than mechanical locks. The risk is administrative: your policy states a lock standard; you install something that does not meet that, and a claim may be refused on a technicality that is completely unrelated to how the case was broken into. Insurers have denied claims for issues that are less important than the one that exists here.
Battery life is second only to insurance as another burning question. Top shelf models announce weeks of battery life before expiring. Most models fail in a shut position and not by bending to the side of the door. Nearly all models have over to seat key triggers. If a model lacks this, consider it a deal breaker. It’s most important you prioritize this feature because some agencies will refuse to certify and register your bikes if it’s removed.
Our take: retrofit over your existing cylinder if you want the upgrade without the insurance admin. Replace the cylinder only if the product explicitly carries a UK certification and you’ve had it confirmed with your insurer in writing. Don’t touch a BS3621 mortice lock on a period door unless you’re adding to it, not swapping it out.
