Langley LOCKSMITH
Locksmith Service

Mortice Locks & Yale Nightlatches

Slough's housing stock covers everything from Victorian terraced houses near the town centre to modern flats along the Bath Road corridor, and most of them share one thing in common: a front door secured by a combination of a Yale-type nightlatch and a 5-lever mortice deadlock. When either of those locks fails, wears out, or needs upgrading to meet an insurer's requirements, Langley Locksmith sends a skilled, insured technician directly to your door — no need for you to travel anywhere or wait for a shop appointment.

Open 24 hours, 7 days a week · Fully insured

Whether you have discovered that your existing mortice lock no longer meets the BS3621 standard your home-insurance policy demands, your nightlatch has become stiff or unreliable, or you have just moved into a property in SL1, SL2, or SL3 and want the locks changed before you settle in, we carry the right hardware on board and can carry out the work at any hour of the day or night, including weekends and bank holidays.

What we do

Available 24/7

Day, night, weekends and bank holidays — a real local locksmith answers and sends a fully-stocked van.

We come straight away

Based in Slough, we send a locksmith straight away — we're usually with you in about 30 minutes.

Fully insured

Vetted locksmiths, a clear price on the phone, and no surprise add-ons when we arrive.

Damage-free entry

We pick and bypass locks the right way, so most lockouts are solved without drilling anything.

Why Mortice Locks and Yale Nightlatches Work Together

Most timber front doors in the Slough area are fitted with two separate locking mechanisms that complement each other. The Yale-type nightlatch — the spring-loaded lock that catches automatically when you pull the door shut — provides convenience for everyday use. The 5-lever mortice deadlock, let into the body of the door itself, provides the serious security layer. When both are present and in good condition, the door is significantly harder to force than it would be with either lock alone. Insurers know this, which is why many household policies in the UK specify that the main entrance door must have a mortice deadlock that meets BS3621. If your policy contains that clause and your lock does not carry the BS3621 kitemark, a claim could be reduced or refused.

A mortice deadlock that meets BS3621 must pass rigorous tests covering bolt strength, pick resistance, and key security. Five levers are the minimum for BS3621 compliance on a timber door. Our technicians verify the standard before recommending a replacement, and we fit only locks that genuinely carry the kitemark — not lookalike products that simply resemble a compliant lock. If you are unsure whether your current lock qualifies, call us on 01753 251949 and we will advise you honestly before any work is agreed.

Fitting and Replacing Mortice Locks and Yale Nightlatches in Slough

Fitting a mortice deadlock is more involved than changing a surface-mounted nightlatch. The lock body must sit precisely within a mortice — the rectangular pocket cut into the door edge — and the striker plate must be aligned perfectly in the door frame. On older doors around areas such as Langley or Cippenham, the timber can be softened by decades of damp, or the original mortice may have been cut slightly off-square, both of which require a technician with hands-on experience rather than a purely theoretical knowledge of locks. Our team assess the door condition before cutting or chiselling anything, and wherever possible we work in a way that leaves the door undamaged and fully functional the moment we leave.

Yale-type nightlatches are quicker to replace but still need the correct backset measurement, the right case size for the existing cut-out, and a rim cylinder that is anti-pick and anti-drill. We stock a range of cylinder grades so we can match the security level to what your insurer or letting agent requires. If you are a landlord or manage a property through a Slough letting agent, we can discuss the right specification for your obligations under current housing standards. For properties where a lock change Slough is needed urgently — perhaps after a break-in attempt on a street near Farnham Road or a lost key on a late shift — we can usually be with you in around 30 minutes of your call.

Emergency Lock Work and Door Lock Replacement Slough

Being locked out of your home is stressful at any time, but it is especially difficult late at night or early on a cold morning. If you find yourself locked out Slough, the sensible first step is to check whether a trusted neighbour holds a spare key, or whether there is a back or side entrance you can access safely. If none of those options are available, call 01753 251949 — we answer 24/7, every day of the year, and we will confirm an exact up-front price on the phone before we ask anyone to travel out to you. There are no vague figures that change once we arrive; the quote we give is the quote you pay.

Door lock replacement Slough covers more than just emergency call-outs. We also attend planned jobs: upgrading locks before an insurance renewal, replacing a worn nightlatch that has started dropping its keep, or fitting a higher-specification lock after a neighbour has experienced a burglary. Whatever the reason, our mobile service means we come to your address in Slough — whether that is a terraced house near the High Street, a flat in a block off Wellington Street, or a semi-detached property in Britwell — with the tools and parts needed to complete the job in a single visit wherever possible. Call 01753 251949 — we answer 24/7.

uPVC Doors, Multipoint Locks, and What Changes for Modern Properties

Not every door in Slough is a traditional timber one. Newer builds and many properties that have had their doors replaced in the last 20 years will have uPVC or composite doors with a multipoint locking system operated by a single handle, rather than the separate nightlatch and mortice combination found on older timber doors. uPVC door lock repair Slough is a distinct skill from mortice lock fitting: the lock mechanism runs the full height of the door in a metal case, and the euro cylinder that operates it can be vulnerable to a technique called lock snapping if it protrudes too far beyond the door face.

On uPVC doors, upgrading to an anti-snap, anti-pick euro cylinder rated to TS007 3-star significantly reduces that risk. We carry TS007-rated cylinders as standard and can measure and replace a cylinder on a uPVC or composite door without damaging the door itself. If the multipoint mechanism has also failed — a common issue on doors more than ten years old, particularly in properties that see heavy use — we can assess whether the gearbox needs replacing or whether the alignment simply needs adjustment. Accurate diagnosis before ordering parts keeps the job straightforward and means we rarely need to make a return visit.

What Determines the Cost of a Lock Change Slough

We do not publish fixed price lists because the right price for any job depends on several genuine variables: the type and specification of lock required, the condition of the existing door and frame, whether the work is carried out during the day or in the middle of the night, travel time to your postcode district, and the cost of any parts needed. What we do commit to is transparency — when you call 01753 251949 and describe the job, we will give you a clear, confirmed figure before we set off. That price covers labour and parts, with no additions once we arrive. Emergency and out-of-hours work, including evenings, weekends, and bank holidays, is reflected openly in the quote rather than hidden in a later invoice.

Frequently asked questions

Does my mortice deadlock have to be BS3621 for my home insurance to be valid?

Many household insurance policies in the UK do specify that the main front door must be fitted with a deadlock meeting BS3621, particularly on timber doors. If your policy contains that requirement and your lock does not carry the BS3621 kitemark, an insurer may reduce a payout or decline a claim following a break-in. It is worth checking your policy documents or speaking to your insurer if you are unsure. When you call us on 01753 251949, we can confirm whether your existing lock is compliant or advise on the right replacement.

How long does it take to fit a 5-lever mortice deadlock on a timber door?

For a straightforward replacement — removing an old lock and fitting a new one of the same size into the existing mortice — most jobs take between 30 and 60 minutes. If the existing mortice needs adjustment, the door edge requires repair, or the striker plate needs repositioning in the frame, the work takes longer. We assess the door when we arrive and let you know what is involved before starting, so there are no unexpected delays.

My Yale nightlatch keeps sticking — do I need to replace the whole lock or just the cylinder?

A stiff or sticky nightlatch is usually caused by a worn cylinder, a misaligned keep, or accumulated grime in the mechanism. In many cases the cylinder alone can be replaced, which is a quicker and simpler job than fitting an entirely new case. Occasionally the internal springs or the latch itself have worn to the point where the whole lock needs changing. Our technician will check the mechanism when they attend and recommend only what is genuinely necessary.

I have just moved into a house near Farnham Road in Slough — should I change the locks?

Changing the locks when you move into a new property is a sensible precaution regardless of how trustworthy the previous occupants may have been. You have no way of knowing how many copies of the original key were cut or who holds them. A lock change Slough on the front and back doors gives you complete confidence that you control access to the property from your first night. We can carry out the work on the day you move in if needed, including evenings and weekends.

Can you replace a lock on a uPVC door, and will it match what my insurer requires?

Yes. uPVC door lock repair and cylinder replacement is a core part of what we do in Slough. We carry TS007 3-star anti-snap euro cylinders that meet the standard increasingly required by insurers for uPVC and composite doors. When you call, let us know the door type and we will confirm the correct specification before we travel out. We measure the existing cylinder to ensure the replacement fits without excessive protrusion, which is the key factor in preventing cylinder snapping.

What happens if I am locked out late at night — is there really someone available?

Yes. We operate genuinely around the clock, every day of the year, including bank holidays. When you call 01753 251949 at 2am on a Sunday or at any other time, you speak to someone who can dispatch a technician straight away. We aim to be with you in around 30 minutes, though travel time can vary depending on where in the Slough area you are and what else is happening on the roads. We confirm the price before we set off so you know exactly what to expect.

Locked out or need a lock fixed? We are on the way.

01753 251949