Spot a British Standard Kitemark on a lock cylinder?

Basically, this means that the BSI (British Standards Institution) has approved the lock cylinder in the sense that it will resist break-in attempts.

When you install a BS-approved lock cylinder, you can rest assured that even once a cylinder lock passes initial scrutiny, further audits are carried out to ensure that the locks continue to meet and exceed security standards.

For you, that means confidence. You’ll know the lock really will protect your property.

They are basically our (the UK’s) national standards body, aiming to improve performance and reduce risk, among other things.

If your front or back doors are uPVC or composite, a TS007 3-star cylinder is exactly what you need.

The three-star rating means that they have been tested to BS EN 1303:2005. In short, the whole lock cylinder assembly is put through its paces to prove it can resist forced entry techniques.

Locks like this are essential as your minimum security level, particularly if your door is near glass or has a letterbox.

People often get confused between BS3621 and TS007, so let’s clear it up:

• BS3621 locks: Usually, mortice locks for timber doors. Insurance-approved, designed to resist drilling, picking, and forced entry. Classic, robust, reliable.

• TS007 cylinders: For uPVC or composite doors. You’ll find them rated from one to three stars. 3 Star is the maximum resistance to snap, bump, or drill attacks.

However, you should remember that a lock is only as strong as the door and the frame that houses it. A 3-star cylinder on a weak frame? Not much help.

• One star: Basic security. Fine for internal doors or low-risk areas.

• Two star: Extra protection. Better for medium-risk doors.

• Three star: Maximum security. Anti-snap, anti-bump, anti-drill. Tested tough.

A TS007 3 star cylinder with Sold Secure Diamond certification? That’s top-tier. Independently tested to resist real-world forced entry. Your home’s security just got a serious upgrade.

The best lock, fitted poorly? Probably not up to scratch.

Mortice locks, sash locks, lever mortices — they all need proper installation to work as intended.

We recommend using a Master Locksmiths Association-approved technician. Why? Because the lock is only as strong as the door frame and alignment.

The type of door locks, locking system and protective hardware that you use on your door will depend largely on the type of door you have.

Wooden door? Your best choice here is a BS3631-compliant 5-lever mortice deadlock.

Got a uPVC and composite doors? Your best bet is a 3-star euro cylinder lock that meets TS007 standards.

Got glass panels, or is your door near a letterbox? Look for locks with key security features that prevent manipulation. And don’t just grab the cheapest option; untested locks won’t give you the protection you expect.

When choosing cylinder locks and security hardware, check for:

• British Standard Kitemark engraved: Proof of independent testing and reliability

• BS EN 1303:2005 compliance: Euro cylinders tested for durability and attack resistance

• BS3621 locks: Ideal for timber doors, offering robust protection

• TS007 3-star cylinders: Maximum resistance for uPVC/composite doors

• One star cylinder: Suitable for low-risk internal doors

• Bolt length: Longer bolts improve resistance to forced entry

• Rim locks: Extra surface-mounted security

• Multi-point locking systems: Distribute locking points for superior strength

• Hardware Federation standards: Ensure handles, hinges, and strike plates meet performance requirements

• PAS cylinder test (Yale locks, etc.): Verified resistance against snapping, drilling, and bumping

• Star rating: Clear indicator of overall security performance

If you feel that there’s too much information or things are confusing, we are here to offer assistance and help. Get in touch with Chelsea Locksmith London now, and we’ll help you fast.

Many burglars try to snap or bump locks, especially euro cylinders. That’s where anti-lock snapping and anti-lock bumping technology comes in, giving higher security locks. These features are tested to stop forced entry in seconds, giving you peace of mind that your lock isn’t a weak link.

Door security isn’t complicated. You just want locks that meet independent protection testing, are rated, and installed properly.

Euro cylinders are a specific type of cylinder lock, that features a distinctive cylindrical shape. They are easy to repair, install and replace, while also coming in a range of security levels and star ratings.

These lock types are often found in both commercial and domestic settings. We can assist you with any type of lock and all brands – from Yale to ABS or Banham.

Ensuring that your locks meet British Standards and have the correct star rating is a safety aspect that applies to an old Victorian terrace or a new build equally.

Every lock counts, from the cylinder lock to the complete mortice assembly.

You’ll sleep better at night knowing your front doors, back doors, and side doors all have locks that have passed strict testing, resist forced entry, and meet insurance-approved standards.

Get in touch today if you need secure lock installing on your property in London.