Best bathroom door lock
Updated: October 2026
You searched for the best bathroom door lock and landed on slide bolts, a rotate bolt, three keyed handles and a sashlock. The highest star line in this amazon.co.uk set is an inside-only bolt. UK guides want a thumbturn inside and a way to open the door from the landing, and none of these ten listings is that lock. Best here means best for a stated job inside this set. Prices and stars are on the [room door lock comparison](/hub/door-and-window-security/room-door-lock), from the listings on 19 October 2026. Peter F. compared those listings and public UK guides in October 2026. There was no lab test. A qualifying purchase can earn a commission at no extra cost to you.
You searched for the best bathroom door lock and landed on slide bolts, a rotate bolt, three keyed handles and a sashlock. The highest star line in this amazon.co.uk set is an inside-only bolt.
You searched for the best bathroom door lock and landed on slide bolts, a rotate bolt, three keyed handles and a sashlock. The highest star line in this amazon.co.uk set is an inside-only bolt. UK guides want a thumbturn inside and a way to open the door from the landing, and none of these ten listings is that lock. Best here means best for a stated job inside this set. Prices and stars are on the room door lock comparison, from the listings on 19 October 2026. Peter F. compared those listings and public UK guides in October 2026. There was no lab test. A qualifying purchase can earn a commission at no extra cost to you.
Our top picks
| Badge | Product | Lock type | Outside opening | Inside control | Note | Price | Offer |
|---|---|---|---|---|---|---|---|
| Best overall |  QWORK QWORK rotate bolt | Rotate bolt | Not listed | Turn | 9.2 | about £5.95 | View offer |
| Best value |  JelKen Jelken 75 mm slide bolt | Slide bolt | Not listed | Slide | 9.0 | about £3.79 | View offer |
 Moonybaby Moonybaby lever safety lock | Adhesive lever lock | Two-button release | Blocks the lever | 9.0 | about £7.99 | View offer |
On this page
What best cannot mean here
Calling a slide bolt the safest bathroom lock would contradict the ironmongers. T.H. Wiggans says the usual fit is a mortice lock with a thumbturn, or a tubular deadbolt with rose handles, and they advise against a slide bolt for safety. More Handles makes the same split: a plain bolt is inside only unless a separate outside piece is supplied. Willow & Stone notes that a barrel bolt is easy to fit and cannot be opened from outside, so you fit one only if the person inside can work it.
This set does not contain that thumbturn. A Union 2226 mortice bathroom lock, from about £42.86, is the pattern those guides describe, with 57 mm centres. It is not an ASIN here, so it is not ranked. No listing prints a BS 3621 or BS 8621 code. The XFORT fire sentence is not a certificate. The QWORK listing states both zinc alloy and stainless steel, so this page will not pick one metal for it. Why 60 mm is not a 44 mm backset sits on the internal door lock buying guide.
If you accept an inside-only bolt
If you can always reach the bolt, and the door is ordinary internal timber, the QWORK rotate bolt is the top pick in this set. It is about £5.95 with 4.6 from 1,833 reviews, the highest star line. Reviewers describe a thick bolt that turns rather than slides, used as a bathroom snib, and fitted in about 10 to 15 minutes. No outside release is listed, the size lines conflict, and one review says a hard kick would still open it. A boot is not a controlled emergency release.
The Jelken 75 × 35 mm bolt is the best value if you want the cheaper screw-on bolt and you will ease the keep. It is about £3.79 with 4.5 from 1,887 reviews, stated as 304 stainless steel, with six screws in the listing. One reviewer locked themselves in because the bolt stuck, and a review mentions a two-pack while the size line says one. Buy it as a single inside bolt. YUOIP is about £3.99 with 4.3 from 3,257 reviews, and reviews call the sheet thin and the edges sharp. All-Pie is about £4.49 for two bolts at 4.5 from 1,325. The lmytdo bolt is the same about £3.79 with 4.2 from 916, and screw heads that shear. Skip every bolt here if a child might fasten the door. That risk is on the bathroom door lock page.
If you need a key or a sashlock
The keyed handles cost more than the bolts and score worse, so price is not a quality ladder. BaBahuanhuan is about £9.99 with 4.0 from only 12 reviews. It states a door of 25 to 45 mm and a 60 or 70 mm latch. One reviewer measured 90 mm and could not use it. Twelve reviews is too thin to treat 4.0 as settled. Faankiton MS0028 is the dearest handle, at about £16.99, with 3.8 from 160. Reviews include a clean swap, and also same-day breakage, a spindle that would not lock a 40 mm door from inside, and a jammed key.
Movstriker, sold with Qrity handles, is about £13.99 with 3.6 from 184 reviews, the lowest star line. Some buyers fitted it easily. Others report a cracked handle, a thin strike, a latch that opened under a push, and a jam that left people locked in until the lock was broken. The XFORT 3-lever sashlock, model 51.05.65, is about £10.99 with 4.1 from 765 reviews. Buy it only when the old mortice matches. Handles are not in the box. The 65 mm in the title is not labelled as backset, and the fire sentence is not evidence for a fire door.
If the problem is a toddler
If a child can push a lever, the Moonybaby two-pack is the only listing aimed at that job. It is about £7.99 with 4.5 from 1,250 reviews. It sticks under a lever, needs two buttons to release, and the listing does not claim EN 16948. Reviews say the tape holds for toddlers. They also say a hard tug pulled one off, removal marked the paint, and spare pads are not in the box. It does not fit a round knob, and it does not stop a child who is already inside with a bolt.
Do not open the QWORK or the Jelken as a child-safety product. Those bolts have no outside release. For a bathroom you must be able to enter, leave this set and look for a thumbturn with an emergency release.
Common questions
Which listing has the strongest reviews in this set?
On stars, QWORK leads at 4.6 from 1,833 reviews. On count, YUOIP leads at 4.3 from 3,257. Jelken is close to QWORK on stars, at 4.5 from 1,887, and costs about £3.79 against about £5.95. Stronger stars still do not add an outside release. None of those three is the thumbturn and coin slot UK ironmongers describe for a bathroom.
Is the QWORK bolt the best bathroom lock?
It is the top pick among the inside-only bolts here, because of 4.6 from 1,833 reviews and the snib comments. It is not the bathroom lock UK guides mean, because no outside release is listed. One review says a hard kick would open it. That is forcing the door, not an emergency release. The listing also disagrees with itself on metal and on size.
Why are the keyed handles rated lower?
The three lever sets sit at 4.0, 3.8 and 3.6, against 4.2 to 4.6 for the bolts, and they cost about £9.99 to £16.99. Reviews cite short spindles, broken mechanisms, and people locked in. BaBahuanhuan’s 4.0 rests on 12 reviews, the thinnest file in the set. A higher price is not a quality ladder on these listings.
Is the XFORT sashlock the best internal lock?
It is the only mortice case here, at about £10.99 and 4.1 from 765 reviews, and it suits a like-for-like 3-lever swap. It is not a 5-lever entrance lock, handles are not included, and the fire wording is not a doorset certificate. Skip it if you need a round forend and this one is square, unless you will recut the recess. The 65 mm in the title is not labelled as backset.
What should I buy if a child might lock the bathroom?
Not a bolt from this set, and not a keyed handle whose reviews include a jam. You want a thumbturn and an emergency release, which these ASINs do not sell. A stick-on lever lock does not open a bolt the child has already fastened inside. The Moonybaby pack only blocks a lever, and only on the side where you fitted it.
Who should skip the Moonybaby lock?
Skip it for a round knob, for a stair barrier, or for a child who locks the bathroom from inside. Also skip it if you cannot accept adhesive marks. A review says a tug pulled one lock off, and the box has no spare pads. The listing does not claim EN 16948. It is a delay on a lever, not a bathroom release.
Related pages
Sources
Public UK sources from the research digest, used for this page in October 2026. Prices, stars and review counts are the amazon.co.uk figures in this comparison. None of the ten listings is treated as BS 3621, BS 8621 or Secured by Design.
- GOV.UK: Fire Safety (England) Regulations 2022 fire door guidance (retrieved October 2026)
- BSI: BS 3621 scope (retrieved October 2026)
- BSI: BS 8621 scope (retrieved October 2026)
- Secured by Design: locks (retrieved October 2026)
- Lloyd Worrall: BS EN 12209:2016 digit guide (retrieved October 2026)
- London Fire Brigade: GN 92 (retrieved October 2026)
- ERA: how to fit a mortice lock (retrieved October 2026)
- T.H. Wiggans: bathroom door locks (retrieved October 2026)
- BABYGO: door handle lock (retrieved October 2026)