Yale BS2 British Standard Nightlatch (40mm backset) – Brass finish

What it is and why people buy it

The Yale P-BS2-BLX-PB-40 is a BS2 British Standard nightlatch designed to give you a more secure, night-time-focused lock on compatible doors. In plain terms, it’s the type of locking solution homeowners and landlords tend to look at when they want better control of access after hours, without stepping into the more complex world of full deadbolt systems.

The “40mm” backset matters because it affects how the latch lines up with your door furniture and cut-outs. Overlook that and you can end up with a lock that simply doesn’t sit correctly—so it’s one of those details worth checking early rather than after you’ve stripped the door.

The essentials (key points you’ll actually notice)

This model is built around a pusher mechanism with a 32mm pusher focus, and it comes in a brass finish. The brass look is fairly classic and tends to suit traditional doors, though of course the visual match will depend on your existing handles and cylinders.

On the security side, the listing states it’s “high security approved by insurance companies”. The phrasing is helpful, but it’s still worth keeping expectations grounded: insurance approval can vary by policy and property type, so if you’re buying for cover, you’ll want to confirm what your insurer requires.

Specs that affect fit and installation

Before you order, the numbers below are the ones you can’t really ignore.

Tech specs

• Name: Yale P-BS2-BLX-PB-40 - BS2 British Standard Nightlatch
• Type: Nightlatch
• Format: British Standard
• Backset: 40mm
• Dimensions (H x W x D): 90 x 69 x 33mm
• Enfoque Pusher / pusher focus: 32mm
• Material: Brass
• Colour: Brass

Where it shines (and where it can fall short)

If your goal is a nightlatch upgrade that fits a BS2 approach and you’ve got a door setup designed for a 40mm backset, this Yale can make a lot of sense. The brass body finish also suggests it’s aimed at everyday residential use where appearance and robustness both matter.

That said, it may not be the best choice if your main priority is maximum, modern control over entry routes. A nightlatch can be a strong improvement, but it isn’t automatically the same thing as the highest-end locking arrangements people use where they need very specific, layered security.

Also, there isn’t enough information in the listing to say how easy it will be to swap in place of every old latch—so if you’re not sure about compatibility, it’s safer to measure and compare rather than relying on the “40mm” alone.

Practical everyday use: a quick micro-scenario

Imagine you come home in the evening, close the door, and then use the nightlatch mechanism to secure the property for the night. With a nightlatch like this, the everyday routine is usually about fast locking when you’re moving in and out—less fuss than complicated systems, but still more deliberate than just leaving a door to rely on basic closure.

Buying verdict

It’s worth buying if you’re specifically looking for a BS2 British Standard nightlatch and your door’s backset is 40mm, with the latch geometry expected to match (including the pusher focus details). It also suits you if you want a brass-finished look and you’re paying attention to security positioning—particularly if insurance requirements are part of your decision.

You may want to skip it if the key dimension match isn’t confirmed for your door, or if you’re hunting for an across-the-board “top tier” security upgrade where you’ll likely need a more tailored locking setup than a standard nightlatch approach.

A solid approach before buying is to double-check your current backset and whether your existing door cut-outs and furniture align with the 40mm requirement.

Quick FAQ

Is the Yale P-BS2-BLX-PB-40 suitable for insurance requirements?

The listing says it’s high security approved by insurance companies, but insurance rules can be specific. If you’re relying on approval for cover, it’s sensible to check what your insurer requires for your property.

What does “40mm backset” mean in practice?

It’s the distance-related fit measurement that affects whether the latch sits correctly in your door. If your existing setup doesn’t match, alignment issues can happen.

What finish does it come in?

It’s listed with a brass finish.

What should I check before ordering?

At minimum, check backset (40mm) and consider whether the pusher focus (32mm) aligns with your door’s mechanism and cut-outs.

Final verdict for who it suits best

For most buyers, this type of nightlatch is a pragmatic upgrade when you want a BS2 nightlatch with a brass look and security credentials stated on the listing—just make sure the fit dimensions match your door before you commit.