At first glance, this might sound like a niche policing story. It is not. The UK government has launched a call for evidence on radiofrequency signal jammers, with the possibility of making simple possession illegal, and that matters to a lot of small businesses that deal with theft risk every day.
These devices can be used to block or interfere with wireless signals. In practice, ministers say criminals are using them to disable video doorbells, block GPS signals in vehicles, interfere with wireless security tags in shops and make it easier to steal tools, stock or vehicles without setting off alarms in the usual way.
What has happened
The government announced the move on 10 April and opened a four-week call for evidence on whether the legal framework around radiofrequency jammers is strong enough. The review will look at the harms caused by illegal use, how effective current enforcement really is, and whether the law should change, including around possession.
That point matters because the current system is not always easy to enforce. The Wireless Telegraphy Act already restricts use and possession of non-compliant equipment, but proving that somebody actually used a jammer to cause interference can be difficult. The government is now asking whether a clearer offence around possession would make it easier to tackle misuse.
Why SMEs should care
For many small firms, the practical issue is simple. Theft does not just mean losing an item. It means cancelled jobs, damaged customer trust, insurance hassle, downtime and extra spending on replacement kit. If you run a trade business, a van theft can knock out several days of work. If you run a shop, repeated low-level loss can quietly eat away at already thin margins.
The government’s own announcement specifically mentions jammers being used to empty vans of tools and to block wireless retail security tags. That makes this much more than a distant national security story. It is directly relevant to builders, electricians, plumbers, installers, independent retailers, convenience stores and hospitality businesses that rely on stock security and vehicle access.
There is also a wider resilience issue. Officials say the devices can interfere with mobile coverage and emergency radio networks, and that a serious disruption to UK positioning, navigation and timing systems could carry a very large economic cost. Most small firms will never face the extreme end of that risk, but they do operate in the real-world knock-on effects, from disrupted deliveries to weaker site security and slower incident response.
What this does and does not mean yet
It is important not to overstate it. The government has not announced a final new law today. It has opened a consultation-style evidence process that could shape future legislation. So there is no immediate new compliance duty for ordinary small businesses simply because this announcement has been made.
There are also legitimate uses for jamming equipment in tightly controlled settings such as prisons and military operations, which is one reason the government is taking evidence before changing the law. The point for SMEs is not to panic. It is to recognise that ministers see this as a growing and practical criminal threat, not a fringe technical problem.
What small businesses should do now
First, review where your business may be relying heavily on wireless-only protection. That could mean GPS tracking on vans, wireless CCTV links, video doorbells, wireless stock tags or connected alarm systems. None of those tools are useless, but single-layer security is more vulnerable if criminals are actively looking for ways to interfere with signals.
Second, check your theft-response basics. For trades, that may mean stronger overnight parking routines, better tool inventories and clearer staff rules on how vehicles are loaded and locked. For retailers, it may mean reviewing blind spots, stock placement, incident logs and how often suspicious patterns are being shared with local police or business crime groups.
Third, speak to your security suppliers or insurers if you are unsure how exposed your setup is. Ask whether your current systems have anti-jamming protections, fallback options or practical limits you should understand. Many smaller firms buy security tech once, then assume it covers every risk forever. It rarely does.
Finally, if your sector has useful evidence on theft patterns or weak enforcement, this is one of those moments when trade bodies and business groups should engage. The government is explicitly asking for views from industry as well as the public, and smaller firms are often the ones living with the day-to-day damage.
The takeaway
This is not a new rulebook for SMEs today. But it is a useful warning about the way theft risk is evolving. If criminals are using relatively cheap devices to undermine wireless security in shops, vans and business premises, many smaller firms may need to think a bit harder about layered protection rather than assuming alarms and trackers are enough on their own.
For now, the practical move is to review your weak points, tighten routines and keep an eye on where this call for evidence leads. If the law changes, it could make enforcement easier. Even before that happens, the announcement is a reminder that old-fashioned theft risks are becoming more technical, and small businesses cannot afford to ignore that shift.
Sources
- Department for Science, Innovation and Technology, UK considers ban on owning signal jamming devices used by car thieves and shoplifters, published 10 April 2026
- GOV.UK, Possession of radiofrequency jammers and the relevant legal framework, published 10 April 2026
