Most front doors are only as strong as the cylinder in them — and a basic euro cylinder can be snapped in seconds. James upgrades Hull homes to TS007 3-star, anti-snap and Sold Secure Diamond locks that meet police and insurer standards, fitted and tested with no call-out fee.
No Call-Out FeeFixed Prices24/7 · 60 Min ResponseDBS Checked · City & Guilds AccreditedFully Insured
The Weak Point Is Usually the Cylinder
Most uPVC and composite doors are fitted with a basic euro cylinder when they go in — and a basic cylinder is the single easiest thing on your home to defeat. Lock snapping is exactly what it sounds like: a burglar grips the cylinder, snaps it, and is through a front door in seconds, no noise and no specialist tools. The door, the frame and the multipoint mechanism can all be sound while that one cheap part lets the whole thing down. Upgrading it is the biggest single security win most Hull homes can make.
Signs you're overdue an upgrade:
The cylinder sticks out past the handle, easy to grip and snap
It's the original lock fitted when the door was installed
There's no anti-snap line or star marking on the face
You've just moved in and can't account for every key
There's been a break-in, or an attempt, on your street
Your insurer has asked for a British Standard or kitemarked lock
What the Ratings Actually Mean
The security world is full of badges, so here's what the ones that matter mean in plain English. TS007 3-Star is the kitemark to look for on a euro cylinder, a 3-star cylinder is built to beat the methods burglars actually use: snapping, drilling, picking and bumping, all on its own.
Sold Secure Diamond is the Master Locksmiths Association's top testing tier; the best-known cylinders, such as Avocet ABS and Ultion, carry it. Secured by Design is the UK police's "preferred specification" scheme, so an SBD product has been through police-backed testing. And BS3621 is the British Standard most insurers want on timber external doors, a kitemarked mortice deadlock or sashlock.
How It Works
Our Upgrade Process
1
Assess Your Doors & Risks
We check what you have, where it's weak, and the standard your insurer or situation actually needs.
2
Fit the Right Rated Lock
Branded, accredited hardware, TS007 3-star, Sold Secure Diamond or BS3621 to suit the door.
3
Register Keys & Test
We register the key code where supported, talk you through the guarantee, and check it all works.
The High-Security Locks We Fit
We fit branded, properly accredited hardware, never an unmarked cylinder off an online marketplace:
TS007 3-Star anti-snap euro cylinders for uPVC, composite and aluminium doors
Sold Secure Diamond cylinders, Avocet ABS, Ultion and similar
BS3621 mortice deadlocks and sashlocks for timber doors
Keyed-alike sets, one key for your front and back doors
Thumbturn cylinders for quick exit in a fire
Patio and sliding-door security bolts
Handle and multipoint upgrades where the whole door needs to reach a 3-star rating
Anti-Snap, in Plain Terms
A proper anti-snap cylinder is designed to snap in a controlled place if it's attacked, leaving the working part of the lock intact behind a hardened section — so even if someone snaps the outside, the door stays locked and you can still open it normally from inside. The good ones add anti-drill, anti-pick and anti-bump protection in the same barrel. Best of all it's a straightforward retrofit: in most cases we simply measure your door, remove the old cylinder and fit the new one, with no need to change the whole mechanism.
What an Upgrade Costs
No call-out fee, ever, and a fixed price before we start, labour, the lock and VAT included. A single anti-snap cylinder upgrade is one of the most affordable improvements you can make to your home's security, and doing the front and back together with a keyed-alike set is usually only a little more. Our price guide shows honest UK ranges, and our guides to anti-snap locks and BS3621 explain the standards in more depth. If you're weighing this up after a scare, how burglars actually break in is worth a read.
Will a high-security lock meet my insurance requirements?
If your policy specifies BS3621 or a kitemarked lock, the locks we fit meet it — and we'll tell you exactly what's been installed so your cover stays valid.
Can I keep one key for both doors?
Yes, a keyed-alike set means your front and back cylinders run on a single key, which is both convenient and easy to manage.
Is an anti-snap cylinder a big job?
Not at all. For most doors it's a quick retrofit done in minutes once we've measured, with no change to the rest of the door.
How do I know if I already have an anti-snap lock?
Look at the face of the cylinder. A genuine anti-snap lock usually carries a star marking (the TS007 kitemark) or a recognised name such as Ultion or Avocet ABS. If it's the original cylinder fitted when the door went in, has no markings, and sticks out past the handle, assume it isn't — and we can confirm it in a minute.
Do I need a security handle as well as a 3-star cylinder?
Not necessarily. A 3-star cylinder gives full anti-snap protection on its own. The alternative route to the same standard is a 1-star cylinder paired with a 2-star security handle, the ratings add up to three either way. We'll advise which suits your door rather than sell you both.
