Hidden cameras and listening devices (often called “bugs”) have become an unsettling reality. Whether you’re worried about someone snooping in your home, your office, or even a holiday rental like an Airbnb, it's a legitimate concern. Modern surveillance gadgets are cheaper, smaller and easier to obtain than ever – anyone can order advanced spy cameras or audio bugs online in a few clicks.
How can you tell if you’re being watched? This guide explains what hidden cameras look like and how to find them. We focus on detecting hidden cameras at home, but also cover offices, rentals, and Airbnbs. You’ll learn about cheap DIY bug detectors, their limitations, and why truly thorough sweeps often require professional-grade equipment.
Hidden cameras can be tiny and very well disguised. In fact, a spy camera can be hidden inside almost any everyday object, making it hard to spot at a glance. Typically, these devices use a pinhole-sized lens – often just a small dark circle or a reflective dot that might be visible if you look closely. They might also have a tiny LED indicator (for power or night vision) that could give them away in the dark.
Some common disguises for hidden cameras include:
If something in a room looks out of place or oddly positioned, trust your instincts. For instance, an unfamiliar charger plugged in with no obvious purpose, or two smoke detectors in one small room, should raise suspicion. Always check for any small holes or glassy spots on objects facing sensitive areas – that’s often the lens. A careful visual sweep is the first step in finding hidden cameras.
Finding a concealed camera or bug takes a bit of detective work. Here are some effective ways to check for hidden cameras in your home (or anywhere else):
Do a thorough physical inspection: Start with a careful sweep of each room. Look at places where a small device could be hidden – on shelves, inside fake plants, behind clocks, or in electronics. Pay extra attention in bedrooms and bathrooms (common targets for voyeur cameras). Check for tiny holes or unusual objects. Listen as well: in a silent room you might hear faint electronic buzzing or clicks if a device is operating. One real-life example: a couple noticed two smoke detectors in one bedroom – one was an illicit camera in disguise.
Turn the lights off and use a torch: A flashlight/torch is one of the best tools to spot hidden camera lenses. In a dark room, slowly pan a bright torch across every surface and corner. Pinhole camera lenses will often reflect the light as a small glimmer. Move the light slowly and scan for any sparkle or eye-shine that could indicate a hidden lens – this method can be surprisingly effective.
Use your phone’s camera (for infrared): Many hidden cameras (especially those that record in the dark) use infrared (IR) LEDs for night vision. These IR lights are usually invisible to the naked eye, but smartphone cameras can sometimes pick them up. Switch off the lights and open your phone’s camera app. Point your phone around at suspect areas (try using the front-facing camera if the rear camera has an IR filter). If you spot a pulsing or steady bright dot on your screen that you can't see with your eyes, it could be an IR LED from a hidden camera.
Check Wi-Fi and network devices: If a spy camera transmits video, it might be using your local Wi-Fi network. Take a look at the list of devices connected to your Wi-Fi (you can do this via your router’s admin page or a network scanning app). See if there are any strange or unknown devices (for example, something with “cam” or an unfamiliar ID). This isn’t foolproof – sophisticated snoopers might use their own separate network or the device might only store footage locally – but it can occasionally reveal an obvious camera feed.
Try a dedicated bug detector gadget: A variety of handheld hidden camera detectors are sold online (more on these in the next section). Typically, these gadgets detect radio frequency (RF) signals emitting from wireless cameras or bugs, and some also have a special red LED light filter to scan for camera lenses. In practice, you would turn such a detector on and walk slowly around the room; it will beep or flash if it picks up a wireless transmission or sees a reflection. In a small home or rental room, a basic detector can quickly sweep common camera frequencies (like Wi-Fi, Bluetooth, or cellular signals).
After going through these steps, you might feel confident that the space is clear – or you might still have nagging doubts. Advanced or well-concealed surveillance devices can evade casual searches, especially if they aren't actively transmitting. If you strongly suspect you're being watched but can't find anything, it may be time to call in a professional.
One popular DIY approach is to use an affordable bug detector to help find hidden cameras or listening devices. If you search online, you'll find plenty of budget-friendly bug sweepers like the K18, G318, or various anti-spy “keychain” finders. These devices are usually priced around £30–£70 and claim to detect hidden electronics. They typically work in two ways:
Radio frequency scanning: The detector will pick up electromagnetic signals being emitted by wireless cameras, bugs, GPS trackers, etc. A decent unit can scan a broad range of frequencies covering common bug signals (FM transmitters, GPS trackers, GSM/3G/4G mobile bugs, Wi-Fi and Bluetooth devices, etc.). When it senses a strong signal nearby, it alerts you with lights or beeps so you can move around and pinpoint the source.
Lens detection via LED filter: Many bug detectors also include a small red-tinted viewfinder with flashing LED lights. By peering through the filter and sweeping the room with the detector’s blinking red LEDs, you can spot the tell-tale sparkle of a camera lens (similar principle to the torch method, but using a dedicated tool).
Do these cheap detectors actually work? – Yes, to an extent. A decent budget detector will pick up many common spying devices. They can quickly locate things like an active Wi-Fi camera or a rogue wireless microphone in a room, and they’re quite handy for scanning a hotel or Airbnb when you arrive. However, you get what you pay for: these gadgets have significant limitations. A spy device that isn’t transmitting (for instance, a camera that only records to a memory card) won’t set off an RF detector at all. Some modern surveillance devices hop frequencies or use encrypted signals that a cheap scanner might miss. And in an urban environment with lots of electronics, an inexperienced user might get false alarms – the detector might beep due to your Wi-Fi router, a neighbour’s Bluetooth, or other harmless signals, unless you carefully adjust the sensitivity.
Even the manufacturers acknowledge the limits. These low-cost detectors are not a substitute for a professional sweep of a property. Think of them as first-line tools for peace of mind. If someone has gone to great lengths to hide a camera or bug, a £40 gadget may not find it.
We regularly see this in real life. One client had already “swept” their own home with a budget detector and was convinced there was nothing there. When our TSCM team attended with professional equipment, we found a hard-wired microphone concealed behind a plug socket faceplate – completely invisible to their handheld scanner. That kind of device only shows up under specialist RF analysis and non-linear junction detection.
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Why would anyone go to the trouble of hiding a camera or bug? There are a few common motives:
In short, hidden surveillance can stem from anything between personal mistrust and criminal intent. Knowing the “why” helps reinforce why it's so important to be vigilant about the possibility.
If you’re dealing with a serious threat or just want absolute peace of mind, professional bug sweeping is the way to go. No matter how clever a hidden device is, a qualified TSCM technician (Technical Surveillance Counter-Measures specialist) has the tools and expertise to uncover it.
Professional bug sweepers use advanced equipment far beyond the DIY gadgets – for example, ultra-wideband RF spectrum analysers to detect even faint or intermittent signals, thermal imaging cameras to spot the heat from electronics hidden in walls or ceilings, and non-linear junction detectors that can locate electronic circuits (even if a device is powered off and not emitting a signal). They also know all the tricks and hiding places from experience.
Our team of private investigators provides bug sweeping services across the UK for homes, offices, rentals – any property where you suspect eavesdropping. We operate discreetly and thoroughly, examining both electronically and through physical inspection to ensure nothing is missed. While cheap detectors can cover the basics, a professional sweep will find highly sophisticated or deeply hidden bugs that amateurs would overlook. We can also help secure your premises against future surveillance threats.
Free quotes and nationwide service: If you’re worried about hidden cameras or bugs, you can reach out to us for a free consultation and quote. All we need are your general location (for example, your postcode) and the size of the property to estimate the scope of a sweep. Our specialists are ready to help you reclaim your privacy and ensure your space is truly secure.
Apple AirTags are popular gadgets for finding lost items, but do private investigators in the UK rely on them to follow people? The short answer is no: professional investigators do not use AirTags to track individuals or vehicles. While tracking devices are indeed a common tool in surveillance, PIs prefer dedicated GPS tracking devices that are far more reliable, discreet, and legally appropriate for investigations. In this article, we will explain why AirTags are not used by private detectives, what alternatives are used instead, and how to tell if someone might be tracking you without your knowledge.
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Private investigators regularly use vehicle trackers during surveillance operations, especially for cases like suspected infidelity where a spouse wants to know if their partner is really “working late” or meeting someone secretly. However, PIs do not use Apple AirTag for this purpose. The primary reason is that AirTags are designed with anti-stalking measures that will alert the person being followed. If an AirTag is placed on someone’s car or in their bag, their smartphone will soon notify them that an unknown AirTag is moving with them. On an iPhone, a notification pops up, and Android devices can detect stray AirTags as well. In short, AirTags cannot be used discreetly; they are likely to give away the surveillance to the target.
Instead of AirTags, professional investigators deploy specialised GPS tracking devices that are purpose-built for covert tracking. These devices are small black boxes, often magnetic, that can be hidden on a vehicle securely. Once in place, a GPS tracker can transmit the vehicle’s live location to an online dashboard or app, letting the investigator monitor movements in real time. Unlike an AirTag, which relies on nearby phones for location updates, a dedicated tracker uses direct GPS satellite positioning and a mobile data connection to report its location continuously. This means a PI’s tracker can provide more accurate and timely tracking information without announcing its presence.
Battery life is another factor. An AirTag uses a tiny coin-cell battery meant for months of occasional use in finding lost items. By contrast, the professional GPS trackers used by investigators have rechargeable batteries that can last one to two weeks or more of constant tracking before needing a swap or recharge. Some advanced models can even last for months in a standby mode. This longer battery life is crucial for ongoing surveillance. You would not want your tracking device dying just days into an investigation.
In summary, private detectives in the UK do use GPS trackers to follow vehicles when it is legal to do so, but they would not choose an AirTag because it is too easily discovered and not nearly as effective for investigative needs. As a leading detective agency, we fit and remove GPS trackers for clients regularly, whether to gather evidence of a cheating partner’s movements, to monitor company vehicles, or to track assets. Our GPS tracking service offers expert installation and monitoring, helping you get the information you need, discreetly and lawfully.
If private investigators avoid AirTags, then who exactly is using AirTags to track people? Unfortunately, it tends to be individuals with questionable intentions or those unaware of the device’s limitations. Since Apple released the AirTag, we have seen cases of people attempting to spy on others by hiding these coin-sized trackers in cars, bags, coat pockets, and other personal items. Often it is a jealous partner or ex-partner trying to keep tabs on someone’s whereabouts. In more sinister cases, stalkers or criminals have misused AirTags to follow victims, which is why Apple implemented the alert system to begin with.
Our team of private investigators has been called in to help clients who suspected an AirTag was secretly planted on them. In one instance, we found a tracker taped inside a car’s wheel arch, wrapped in black tape to avoid detection. It had been placed there by an estranged ex who was trying to find out where the victim was going each night. The victim in that case did receive a phone alert eventually, which is how they became suspicious and contacted us.
It is important to note that while AirTags get the most press, there are many other tracking gadgets readily available online, from cheap magnetic GPS trackers to covert locator devices disguised as phone chargers. These will not trigger phone alerts like an AirTag does. If someone is determined to track you, they might use one of those instead. That is why any unexpected tracking device is cause for concern. If you happen to discover a hidden tracker on your vehicle or in your belongings, be very cautious. It could be the work of someone with ill intent. You should remove the device or disable it by removing its battery and consider reporting it to the police, especially if you feel you are in danger.
For added safety, you may also want to have a professional conduct a thorough bug sweep of your vehicle and home, in case the person spying on you planted other devices like hidden microphones or cameras as well. Our TSCM services cover vehicles, homes, and workplaces, and can help restore your privacy if you suspect that someone has gone beyond placing a simple tracker.
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Vehicle tracking bug sweeps and TSCM services across the UK

What if you suspect that someone, perhaps not a PI but an estranged partner or stalker, has fitted a tracking device to your vehicle? Detecting a hidden GPS tracker on your car can be tricky, but there are some practical steps you can take.
Remember to stay safe while searching. If you do find a suspicious device, handle it carefully. You may want to preserve it as evidence by photographing it in place before removal. Alerting law enforcement is wise if you believe you are being stalked or harassed via an illicit tracker.
One of the few upsides of Apple’s AirTag, if it is used maliciously, is that it will try to warn the potential victim. Apple built in safety features to combat AirTag stalking. Here is how it works.
If you have an iPhone, your device is constantly on the lookout for any AirTag that is not yours but seems to be travelling with you. Within a few hours of an unknown AirTag moving with you, your iPhone will display a notification saying something like “AirTag Detected Near You” or “Unknown Accessory Detected”. You can tap the alert for more information. It may display the AirTag’s serial number and offer an option to make it play a sound, helping you locate it.
For Android users, Apple provides the Tracker Detect app which you can install to scan for AirTags. Google has also started rolling out built-in AirTag detection alerts on newer Android phones via Google Play services, meaning many Android devices will automatically warn you if an AirTag is moving with you. Below is an example of what an AirTag alert looks like on an Android device:
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If you receive an alert like this, it means an AirTag or similar device has been detected nearby and is moving with you. Follow the instructions on your phone. It will typically guide you to find the AirTag and disable it. An AirTag can be disabled by twisting it open and removing its battery. You might also want to hold your phone next to the AirTag to read its NFC information. Apple can work with law enforcement in serious cases to trace an AirTag back to its registered owner.
It is worth reiterating that if someone is tech-savvy and malicious enough to track you, they might not use an AirTag at all. As noted earlier, there are many GPS trackers that will never notify the target. Those devices are more dangerous from a privacy standpoint because you will not know they are there without a physical or electronic sweep. This is why staying vigilant and periodically checking for signs of trackers is important if you have reason to believe you are being monitored. If in doubt, calling in professionals to conduct a sweep can give you peace of mind.
The legality of tracking someone with a GPS device in the UK depends heavily on the circumstances and intent. It is not outright illegal to fit a tracker to a car. For example, if you own the vehicle or have the owner’s consent, using a tracker can be lawful. Many spouses have legally asked private investigators to put a tracker on a family car they personally own, in order to document a partner’s movements in an infidelity investigation. This can fall within the law as there is a legitimate reason and no breach of the peace.
On the other hand, secretly tracking someone without any justifiable reason can violate privacy and harassment laws. Stalking an individual with a device, especially if you have no right to monitor them, is likely illegal and can lead to criminal charges. Private investigators must also follow legal guidelines. For instance, we cannot trespass on purely private land to plant a tracker. If a vehicle is accessible in a public area, such as parked on a public street, a professional investigator can covertly attach a tracker without it being considered trespass. All data gathered must be handled in compliance with privacy regulations.
If you are considering using a GPS tracker yourself, it is wise to consult the law or speak to an expert because each situation can differ. We cover these nuances in our GPS Tracker FAQ: Is it legal to fit GPS trackers in the UK? blog post. In general, if you have a legitimate reason, such as protecting your property or investigating a spouse’s honesty, and you own the asset being tracked, you are on firmer legal ground. Tracking someone purely out of curiosity or jealousy when you have no rights to their information is likely to cause legal problems.
Bottom line: Private investigators can and do use GPS trackers legally as part of their toolkit, but they operate within the bounds of UK law and ethical practice. AirTags, however, are not part of that toolkit because of their limitations and anti-stalking features. If you need vehicle tracking done properly, or suspect someone has tracked you, it is best to engage with professionals. Our team is experienced in both deploying GPS trackers for legitimate investigations and detecting or removing unauthorised trackers through comprehensive bug sweeps.
If you have any concerns about tracking devices or want to discuss an investigation, feel free to contact us for a free, confidential quote. We are experienced in fitting GPS trackers, installing them as part of surveillance operations, and checking vehicles and properties for hidden devices. Your safety and peace of mind are our priority.

A practical UK-focused guide to when you can record people or conversations, when consent is required, how GDPR applies, and why bugging a home is never lawful.

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