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Socket lock dementia: keeping the plug in

Updated: 23 October 2026

You are trying to stop a telecare base, a router, or the fridge being switched off, after labels and tape have already failed. A socket lock for dementia at home closes over the plug that must stay powered, and you keep the spare key. It does not secure a telephone jack, and it will not stop someone using a kettle. Listings are on the [socket lock comparison](/hub/sockets-and-extension-leads/socket-lock). We used Alzheimer's Society's 30 January 2025 piece, a Dementia Support Forum thread, the Tunstall Lifeline Connect guide, and the amazon.co.uk notes, on 21 October 2026. This is not a clinical trial. A qualifying purchase can earn a commission at no extra cost to you.

You are trying to stop a telecare base, a router, or the fridge being switched off, after labels and tape have already failed.

Our top picks

Knightsbridge Knightsbridge CU9LOCKN

Best overall

Knightsbridge Knightsbridge CU9LOCKN
6.7/10about £13.88
View offer
PlugMinder PlugMinder 80 mm cover

Rank 2

PlugMinder PlugMinder 80 mm cover
8.6/10about £21.99
View offer
PlugMinder PlugMinder 38 mm cover

Best value

PlugMinder PlugMinder 38 mm cover
8.2/10about £18.99
View offer
On this page
  1. 1.What keeps getting switched off
  2. 2.A cover that leaves the plug powered
  3. 3.The alarm is often two plugs
  4. 4.When a lock is the wrong kindness

What keeps getting switched off

Alzheimer's Society's Dementia Together article of 30 January 2025 collects what carers tried: furniture in front of a socket, tape, a keyed cover, sometimes a smart socket. One household put the fridge and washing machine on fixed fused supplies. The harm is a home that goes quiet, warm, or dark. The Dementia Support Forum thread from March 2025 names the fridge, the Wi-Fi, and a LifeLine24 pendant base. Labels and tape were torn off. A reply describes a hinged box and a padlock, with the key taken away. Lock the telecare base, the router it depends on, and the fridge. Locking every socket can remove things the person can still do safely.

A cover that leaves the plug powered

The matching product closes with the plug in. In this set that is the PlugMinder double. The shared review block, 4.6 from 43 on each depth and counted once, mentions dementia, telecare, and chargers that had been taken. Warmhm's texts mention dementia switches, but they do not show Type G. Knightsbridge reviews do not mention dementia, because that row is a key-lock outlet. Measure on the buying guide. The 38 mm PlugMinder is £18.99 for many ordinary plugs. The 80 mm double is £21.99 for a plug-top brick, which a router supply often is. The spare key stays with the carer. Two tools do not help if the spare sits under the router. A smart socket can still be unplugged if the plug is free.
Knightsbridge Knightsbridge CU9LOCKN

Testsieger

Knightsbridge Knightsbridge CU9LOCKN
6.7/10about £13.88
View offer

The alarm is often two plugs

A pendant base usually needs mains, and many still need the telephone socket. Tunstall's Lifeline Connect guide describes a 230 V adaptor on a 13 A socket, and a Safe Socket that seizes the telephone line. That Safe Socket is not a mains lock. A mains cover will not stop someone pulling the BT jack. If you only lock the 13 A plug, you have done half the job. The same guide states a standby battery of about 30 hours and one call of about 30 minutes, as printed there. That battery does not replace the cover. Ask the provider which lead is mains and which is the phone. A fixed fused supply, from the Alzheimer's Society piece, removes the plug. An electrician does that. This page does not tell you to wire it yourself.

When a lock is the wrong kindness

A key-lock socket such as CU9LOCKN can be locked off as well as on. That suits a corridor you want unused. It is a poor match for a router that must stay on. Do not buy the 5.0 from 3 as if it were the dementia cover. The cover versus that key socket is on the best socket lock page. Do not lock a kettle or a lamp the person still uses safely. ClearSTOP, at £67.44 including VAT with 102 mm of protrusion, carries a maker note to lock the socket off. That fights a fridge that must stay on, and it is outside this set. Do not fit a pin-in child cover and call it part of the same plan. Those inserts do not hold a plug in. Nothing on this page stops falls or wandering.

Common questions

Will a socket lock stop a telecare base being switched off?
A cover over the 13 A adaptor can stop that mains plug being pulled, which is what the PlugMinder reviews describe for telecare. It does nothing for a telephone lead in a BT jack. You still need the provider's picture of which cable is which, and the spare key kept with the carer rather than in the room.
What if the alarm uses the telephone socket as well as the mains?
Treat them as two problems. Tunstall's Safe Socket seizes a telephone line. It is not a lock for a 13 A plug. A mains cover does not hold a BT jack. The stated standby battery, about 30 hours and one short call in the Tunstall guide, does not replace either fixing.
Should the fridge stay on a plug, or go to a fused supply?
If a cover of the right depth will close over the fridge plug and the key stays with you, a cover is the smaller step. Alzheimer's Society describes fixed fused supplies when a plug was not workable. That is an electrician's job. A key socket that can be locked off is the wrong default for a fridge that must stay cold.
How deep a cover for a microwave or a router brick?
Measure from the wall to the furthest point of the brick or the bend. Ordinary plugs are the 38 mm class, at £18.99 in this set. A plug-top supply is why PlugMinder sells 80 mm, at £21.99 here. Shared reviews include moulded plugs that would not pass the cable exit. Do not assume 38 mm will close on a bulky microwave plug.
Is a key-lock socket right if the person must not turn the router off?
Only if you accept that it locks off as well as on, and that you are replacing the outlet. The Knightsbridge reviews do not mention dementia. A cover over the router plug, deep enough for the brick, matches a plug that must stay on more closely. If you cannot prove the circuit dead, do not swap the socket yourself.

Related pages

How to fit a lockable socket cover

Socket lock

Best socket lock UK: one cover, one key-lock socket

Lockable socket cover: which kind, then plug depth

Socket covers vs lockable socket: a blank or a lock

Sources

Sources taken from the research digest. Listings were scored on 21 October 2026. This page did not run a lab test.

  1. Plugs and Sockets etc. (Safety) Regulations 1994 (retrieved 21.10.2026)
  2. IET Wiring Matters, socket-outlet protectors (February 2020) (retrieved 21.10.2026)
  3. BEAMA position paper on socket outlet covers (5 June 2017) (retrieved 21.10.2026)
  4. Electrical Safety First — socket covers (retrieved 21.10.2026)
  5. Electricity at Work Regulations 1989, regulation 12 (retrieved 21.10.2026)
  6. HSE HSG85 (retrieved 21.10.2026)
  7. Approved Document P (England, 2013) (retrieved 21.10.2026)
  8. CU9LOCKN datasheet — ML Accessories (retrieved 21.10.2026)