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Plug-in socket covers vs box covers for UK sockets

Updated: 23 October 2026

You are choosing between white plugs that push into empty holes and a box that screws over a socket you still use. Plug-in socket covers vs box covers is that choice, plus the adhesive disc between them. On a UK BS 1363 socket an insert’s pins open the shutters. A box sits outside and can leave a plug in place. Rows and scores are on our [childproof socket covers comparison](/hub/sockets-and-extension-leads/childproof-socket-covers). Figures are amazon.co.uk prices from 20 October 2026. We did not run a lab test. A qualifying purchase can earn a commission at no extra cost to you.

You are choosing between white plugs that push into empty holes and a box that screws over a socket you still use. Plug-in socket covers vs box covers is that choice, plus the adhesive disc between them.

Our top picks

BABYGO BABYGO 12 adhesive discs

Best overall

BABYGO BABYGO 12 adhesive discs
8.4/10about £9.95
View offer
Norjews Norjews 20-pack inserts

Best value

Norjews Norjews 20-pack inserts
7.7/10about £5.99
View offer
SAFELON SAFELON double box

Alternative

SAFELON SAFELON double box
7.9/10about £9.99
View offer
On this page
  1. 1.What each side actually blocks
  2. 2.When a plug-in insert is the wrong tool
  3. 3.When a box or a disc is the closer match
  4. 4.One recommendation, with a condition

What each side actually blocks

A plug-in insert copies a 13 A plug and goes into an unused outlet: 10 at about £3.99 (4.4 from 4,153), 24 at about £5.98 (4.4 from 917), ZHIYE at about £5.99 (4.5 from 210), Norjews at about £5.99 (4.6 from 1,562), and HF-123 at about £3.95 (5.0 from one review). They do not cover a switch, and they cannot go where a plug already lives. A box is a shell. EUDEMON is about £9.99 (4.1 from 114) and SAFELON W6205/6206 is about £9.99 (4.2 from 489). Both cover a plug and the switch, with screws behind a dead faceplate. BABYGO at about £9.95 (4.8 from 43) has no pins and sits with the boxes on the shutter question. Sources are on the safety page.

When a plug-in insert is the wrong tool

An insert is the wrong tool when the holes are already full, and the wrong extra on a healthy shuttered socket. The IET describes about 9.6 mm of pin travel before live contact. BEAMA advises against covers that can overcome that arrangement. EFA/2016/002 says 13 A inserts should not be supplied for homes. A 4.6 from 1,562 Norjews reviews means the plastic felt tight. It does not mean the pins avoid the shutter. Use one only on an unused standard plate a real plug can clear. Otherwise leave the shutter to do that job. The order is in the buying guide.
BABYGO BABYGO 12 adhesive discs

Testsieger

BABYGO BABYGO 12 adhesive discs
8.4/10about £9.95
View offer

When a box or a disc is the closer match

Choose a box when a slim plug stays in and you want the switch out of reach. SAFELON leads on review count, 489 against EUDEMON’s 114, at the same about £9.99. The plug must fit under the lid, and the back box must take the screws. A transformer plug defeats both. Choose the BABYGO disc when you still plug in and out, you do not want pins in the shutter, and the plate is flat and dry. Forty-three reviews is a thin file, one baby pulled a disc off, and EN71-3 is not a socket certificate. Skip the about £7.99 clip and the about £5.99 latch-free flip. The about £4.99 switch guards cover a rocker only.

One recommendation, with a condition

If the socket is unused and in good condition, buy neither. The shutter is what CAPT points to, and an insert is what the NHS alert tells you to withdraw. If a plug stays in, buy SAFELON rather than an insert when the plug is slim and the back box can hold the screws. If you plug in and out and want the cover to stay on the plate, buy the BABYGO disc, and accept 43 reviews plus a proper cure. Insert packs will fill every hole, and this comparison marks them down for shutter interaction. Norjews is the best value inside that group, not the winner of the mechanism comparison. Scenario picks are on best child proof socket covers UK.

Common questions

Which is safer for a toddler?
On an unused, undamaged UK socket, rely on the shutter rather than a pin-in cover. BEAMA and EFA/2016/002 argue against those inserts. Where a plug must stay in, a screw-on box that actually closes is the closer match. We have no lab ranking of a safest cover.
Why do inserts have better star ratings than boxes?
The big insert files are 4.4 to 4.6 from hundreds or thousands of reviews, while SAFELON is 4.2 from 489 and EUDEMON is 4.1 from 114. People are rating easy push-in fit, not a shutter test. A higher star line does not overturn the guidance against putting pins into the outlet.
Where does the adhesive disc fit in this comparison?
BABYGO’s disc is on the box side of the shutter question: no pins, cover stays on the plate, you twist to plug in. It is not screwed to the back box, so it will not restrain a chunky plug the way a deep box might, and a child peeled one off in at least one review. At about £9.95 for 12 it covers more outlets than one about £9.99 box, with a much smaller review file.
Can I use a clip-on cover instead of a screwed box?
The clip-on double in this set is about £7.99 and 3.6 from 84 reviews. Buyers describe a 3D-printed feel, clips that snap, and lids that are hard to open. That is a weak stand-in for SAFELON or EUDEMON if you need a plug enclosed every day. Tool-free is only an advantage when the clip survives.
Will either type fit a metal faceplate?
Inserts in these files are aimed at standard white plates and miss on decorative ones. Boxes depend on the back box behind the plate, whatever the metal finish looks like. Discs need a flat surface the pad can bond to. Test one outlet before you buy a 24-pack for a room of metal plates.
What if I only want to stop the switch?
Neither an insert nor a full box is required for that single job. The switch-guard four-pack at about £4.99 sticks over the rocker and leaves a pen slot. It does not block pin holes, so do not buy it thinking it replaces either side of this comparison.

Related pages

How to install socket covers UK

Childproof socket covers

Best child proof socket covers UK by household hazard

Child proof socket covers buying guide for UK homes

Are socket covers safe UK for homes and childminders

Sources

Sources taken from the research digest. Listings were scored on 20 October 2026. This page did not run a lab test.

  1. IET Wiring Matters — socket-outlet protectors (retrieved 20.10.2026)
  2. BEAMA — position on socket-outlet covers (retrieved 20.10.2026)
  3. NHS/MHRA — EFA/2016/002 alert (retrieved 20.10.2026)
  4. Child Accident Prevention Trust — socket covers (retrieved 20.10.2026)
  5. Electrical Safety First — socket covers (retrieved 20.10.2026)
  6. Lincolnshire HSB48 — plastic socket covers (retrieved 20.10.2026)
  7. Fatally Flawed — socket cover FAQ (retrieved 20.10.2026)