Lock changes are one of our most common jobs — an honest ETA on the call, fixed price agreed before we set off, with any attendance costs included in the written quote. Whether you've just moved in, lost a key, split with a partner, suffered a break-in attempt or simply want to upgrade to TS007 3-star insurance-approved cylinders, the work is straightforward and quick.
We can discuss compatible replacements including TS007 3-star (Sold Secure Diamond) Avocet ABS, Brisant Ultion and Mul-T-Lock euro cylinders for UPVC and composite doors; BS3621 Banham, Chubb 3G110 and Union 2C13 mortice locks for traditional timber doors; full keyed-alike sets in any common cylinder size. We confirm part availability for the job before dispatch.
There are no surprise extras for the same agreed scope. Material differences or extra work require a new price agreed before anything extra is done.
When you should change your locks
Moving into a new home is the single most common reason. You genuinely don't know how many keys are in circulation — the previous owner may have given keys to cleaners, dog-walkers, neighbours, ex-partners, builders, estate agents.
After losing a key set you can't account for — particularly if the keys had an address tag or were lost near home.
After a break-in or attempted break-in. Even if the burglar didn't get in, they now know the door type and the lock spec — a TS007 3-star anti-snap upgrade hardens the door against repeat attempts.
After splitting from a partner, housemate or employee who held keys. The cleanest outcome legally and practically is a fresh cylinder.
After several years on the same locks if you want to upgrade to insurance-approved TS007 3-star. Most pre-2010 UK locks aren't 3-star, and a meaningful number of UK home-insurance policies now either recommend or require it.
What gets changed: cylinder vs full lock vs mortice
Euro cylinder change (UPVC and composite doors): the lock body stays in the door; we swap only the cylinder. Quickest and cheapest. 20–30 minutes per door.
Full UPVC lock change: cylinder plus the multipoint gearbox. Best value if the door is older and the gearbox is also showing wear.
BS3621 mortice lock change (timber doors): removing and refitting a 5-lever mortice. We carry brass-finish Banham, Chubb 3G110 and Union 2C13 to keep the door furniture aesthetically right.
We fit BS3621-approved 5-lever rim deadlocks where insurers require them.
Multi-door keyed-alike sets: front + back + side on one key. The most-requested upgrade because of the daily convenience.
TS007 3-star: the insurance-spec cylinder upgrade
If we're already on site changing a UPVC cylinder, we always recommend a TS007 3-star (Sold Secure Diamond) upgrade. Standard 1990s/2000s cylinders are snappable in under 30 seconds with widely-available tools — the most common method used in UPVC front-door burglaries across the UK.
TS007 3-star solves this with a sacrificial section that snaps cleanly without exposing the working mechanism, plus a hardened anti-drill core.
We fit Avocet ABS, Brisant Ultion and Mul-T-Lock TS007 3-star cylinders as standard, all with the kitemark insurers ask for.
What to expect when you book a lock change
Call or WhatsApp with the door type, lock type if known, and any photos of the existing lock. We confirm the part is on the van, quote a fixed total, and give you an arrival window — typically same day, subject to availability.
We confirm the agreed work before starting, fit compatible parts, test the lock with you and provide your new keys and receipt. Payment methods are confirmed when booking.
Ask us to confirm workmanship cover and the specific manufacturer's warranty in writing for your chosen parts.