Alcoclocks: What Are They and How Do They Work?
Raffa Bari - Author | Last Updated: 23rd June 2026
Posted on Tuesday, June 23, 2026 at 11:30 am
Drink driving is a persistent issue in the UK. According to the latest figures, there were 4,390 drink-drive collisions, and between 230 and 290 people are killed each year due to drink driving.
Whilst heavy consequences are associated with drinking, current measures don’t seem to be sufficient, as the RAC discovered that in the last 11 years, 26,819 people with licences have been convicted more than once.
Alcoclocks, also known as alcolocks, are devices that are installed in cars to stop people drink driving, capable of preventing those under the influence from operating their vehicle. There is rising support for their wider use, and they can play a crucial role in alcohol monitoring for those in recovery.
We’re going to take a deeper look at acloclocks, how they work and what their role could be in alcohol recovery.
An alcoclock, also known as an alcohol ignition interlock, is a breathalyser that is installed directly into the car. They are primarily used as alcohol monitoring devices to prevent people from drink-driving.
They are commonly used as part of agreements with the court after an offence and are becoming increasingly used as part of rehabilitation programmes.
Alcoclocks have been used effectively in countries around Europe and are gaining support in the UK. Over 4 in 5 drivers support the introduction to reduce repeated offences of drink driving.
The breathalyser handset is connected directly to the car’s ignition system. Before you turn the key or press the ignition button, you have to blow into the handset. An alcohol sensor in the device then analyses the breath sample and measures the BrAC (breath alcohol content).
If you are over the preset alcohol limit, then the car will not start.
When using the device as part of a court order or rehabilitation programme, there can be scheduled test times. Not only can tests occur to start the car, but there can also be rolling tests while driving, to ensure no drinking has occurred in the vehicle, though this will not switch off the vehicle.
The handset will flash up reminders and countdowns to scheduled tests.
To verify identity and avoid cheating, breath samples are asked to be given in a certain way, such as humming and a suck-back breath pattern that has been learned, making it hard to replicate.
Every interaction with the alcoclock is documented. This data can then be downloaded during maintenance appointments and check-ins or electronically transmitted, sending real-time alerts to the relevant people.
Alcoclocks can be utilised in various situations.
Alcoclocks and similar devices have many benefits, including:
Whilst alcoclocks have many benefits in a variety of situations, there are limits to how helpful the technology can be. These limitations are particularly more apparent when used as part of recovery efforts, rather than as a monitoring tool for someone who has broken the law.
Considerations that need to be given attention to include:
Rather than being the main tool of recovery, an alcoclock will be most effective when combined with professional support.
Accountability is central to recovery. To overcome an addiction, you have to admit you have one and that you are responsible for your actions. With this honesty, you show you are ready to change and prove a willingness to make more positive decisions in your life. Alcohol monitoring can complement therapy and treatment because it provides real-world, but not devastating, consequences for not committing to recovery.
If you drink, you cannot operate your car. This is a consequence that impacts your life, demonstrating the negative consequences of addiction. Alone, alcohol monitoring could just be a way to punish or keep track of people. It should be used as a wider recovery plan, a tool to facilitate treatment and encourage recovery efforts.
There are many cases where there may be no choice but to use an alcoclock.
Alcoclocks are alcohol monitoring devices that can prevent people under the influence from operating their vehicle, requiring a breath sample before they can start the car.
Whilst used prominently in law, they can be used as a supportive recovery and monitoring tool to help those in treatment maintain accountability and hit recovery goals.
If you are suffering from addiction recovery, contact Cassiobury Court today. We offer confidential support and guidance to those seeking to take the first steps on their recovery journey.
Raffa Bari - Author Last updated: 23rd June 2026
Raffa manages the day to day caring services here at Cassiobury Court. Dedicated to the treatment and well being of our visitors she is an outstanding mental health coach registered with BAAT (British Association of Art Therapists). Raffa has outstanding experience in managing rehabs across the country and is vastly experienced at helping people recover from drug and alcohol addictions.