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We boast over 20 years of experience in intelligence gathering for clients all over the world.



Private Investigator Services in Glasgow

Scottish Investigations

We offer investigative services to private and corporate clients in Glasgow, across mainland Scotland, and in the rest of the United Kingdom.

Our Glasgow office sits off the western end of Sauchiehall Street. It’s easily accessible via the Charing Cross railway station and the 23, 3, 38, 4, 500, 77, 9, X19, and X8 bus services. You can also reach our office via The Subway, as we are just a ten-minute walk from the St. George’s Cross underground rail station.

Unfortunately, for safety and security reasons, we can’t see walk-ins. We don’t want to send you away, so please get in touch before you drop by. If you’d like to come and visit us, please make an appointment by calling 0141 280 9978. Alternatively, let us know where you are, and we’ll come to your home or office. We do charge a fee for face-to-face consultations, but we’re always happy to chat on the phone for free.

If you’re not based in Glasgow and you’re looking for services in England, feel free to check out our offices in Preston, Birmingham, and London.



John provided my company a brilliant service. Surveillance was needed to check if an employee was really off sick or not. We were provided with a very professional and fast service, and a very clear, detailed report. This helped the company to obtain all the evidence that we needed. I Will definitely be using John again. Thank you.


The service i received was brilliant. Very professional and discreet. I had a feeling that my partner was cheating on me and unfortunately it turned out i was right. John was very sympathetic and was very helpful with all his good advise. He helped me get through a very tough experience. I will always be very grateful. Thank you John.


I can well recommend these services John was very committed and finally got my results. Whenever you need advice or someone to listen this man is dedicated and advises the way to go. Thank you John. I.can well recommend this company.



Scottish Private Detective Agency with a Global Reach

Local Detectives Everywhere

We’re an independent, family-run private investigation company offering UK-wide services. We work with agents across the world, so wherever your case takes us, we guarantee we can get high-quality private detective on the ground in a matter of hours.

PI UK is proud to be different from other investigation agencies. We focus on our clients’ goals and tailor every case to suit them. We offer a variety of contact options and a choice between a male or a female private investigator. We work hard to make sure every client feels as comfortable, up-to-date, and supported as possible.

Expert Private Detective in Glasgow



PI UK takes a personable approach to investigations. We don’t believe that we can provide you with the service until we take the time to get to know you, your values, and your investigative goals. This is why we offer a free 30-minute consultation to all our prospective clients. Once we understand your needs, we develop a bespoke intelligence plan tailored specifically to you.


Our investigators are all fully qualified and highly experienced, with military and police backgrounds. Our agents are highly trained in all the services we offer, so you can be confident that you’re getting the best service possible.


Whatever the outcome of your investigation, we’re here to support you. All our findings are detailed in an organised, court-admissible final report, which will be easy to understand. We don’t use jargon or try to blind you with science. We offer follow-up consultations to answer any questions you may have about your investigation.

Corporate Investigations

Taking Care of Businesses

Although not the capital, Glasgow is Scotland’s largest city by a significant margin, both in terms of population and land area. The area around the river Clyde has been occupied since ancient times, but the city really took off in the Early Modern Period.

A hub of Atlantic trade, the industrial revolution saw Glasgow go from strength to strength. Today, an estimated 28% of all Scottish businesses are based in Glasgow city, not including the Greater Glasgow area. With so many companies operating in Glasgow, we see the need for us to protect them.

PI UK offers investigative solutions for businesses across Scotland. Our most popular corporate services are our tiered enhanced due diligence background checking packages. Before you welcome someone onto your team or make a significant investment, it’s good practice to find out as much as you can about the people you’re getting involved with.

We also offer personal injury surveillance, asset traces, and security surveillance as part of our mission to protect Glasgow’s businesses. To discuss for free how we can help to protect your company, please get in touch with us on the phone. Alternatively, please fill out a contact form, and one of our agents will get back to you today.

Professional Investigators for Private Clients

Uncover the Truth

There are many different reasons why someone might need to hire a private investigator to help with a problem in their personal life. When you think of the stereotypical PI, cheating spouse investigations probably come to mind. Not only do we offer infidelity investigations to members of the public, but we can also help with divorces, call tracing, vehicle tracking, prenuptial investigations, and child custody disputes.

We understand that asking for our help is a difficult first step to take. We promise that we’ll treat you with compassion and dignity, and we’ll make sure we’re available to offer advice 24 hours a day. For a free consultation and friendly advice, please give us a call on 0141 280 9978.

We Understand Your Needs

What Sets PI UK Apart From Other Glasgow Investigation Agencies?

We find that some PI agencies are too cold and clinical in their approach. The investigators can get tunnel vision, without really listening to your needs. While collecting evidence is important, we think this approach can take away from the quality of service that you receive.


We’re client-focused, so we’ll make sure you get the results you want, while making sure you feel supported and understood. Please get in touch with us for friendly, professional advice and a free, no-obligation consultation of up to 30 minutes.


Is your husband or wife behaving strangely? PI UK can help.

We’ve spent the past 20 years perfecting our surveillance techniques. Find out how surveillance can help you.

We believe a successful marriage begins with an investigation. Make sure you know who you’re welcoming into your family.

PI UK’s relationship expert has put together a list of red flags to look out for in your relationship.

Divorces are always unpleasant, especially if things get messy. PI UK can help.

Our infidelity investigator answers every question you could have about looking into unfaithful partners.

Nobody wants to fight for the right to care for their child. Find out about how our services can help.

We’ve perfected our number tracing strategy. Find out who’s calling you with help from PI UK.

Hidden assets can be damaging for hundreds of different reasons. Read about PI UK’s asset searching services.

If you need to find out where someone lives, PI UK’s Address Finder can help. 

We specialise in uncovering the past. PI UK offers private background checks for businesses and individuals.

Due Diligence helps you to ensure that your company is safe when you make major decisions.

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