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Inquire now for a FREE consultation with a confidential private investigator at SPI

private investigator UK services


SPI offer a wide range investigative services tailored to individual requirements.

Private Investigator Services

SPI are an established private detective agency offering confidential services across the West Midlands, East Midlands, East of England and London. We provide a wide range of private investigations including covert surveillance operations, TSCM bug sweeps, GPS vehicle tracking, trace debtor services, private investigator background checks and much more.  Our services are tailored to gather reliable evidence which naturally positions our clientele in stronger standing positions. This, then allows for informed decision making on how best to proceed with their situations. 

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Private Investigator Birmingham Covert Surveillance Operations




  1. close observations, especially of a suspected private investigator, private detective or spy.

One of the most effective methods of evidence gathering for a private investigator Birmingham is a covert surveillance operation. A surveillance operatives main objective when conducting private investigations is to capture evidence of a data subjects movements and behaviours  on film whilst remaining covert and undetected. Complex private investigations can require a number of different services which will pull on different expertise across the investigative industry in order to produce various types of evidence. However, covert surveillance is essentially the "nitty gritty" tradecraft of a private investigation which requires skilled, competent and professional agents to achieve their objectives in a legal and ethical manner.

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Sentry Private Investigators are experts in the field of covert surveillance operations. When it comes to private investigations, covert surveillance is actually the main service our private investigations firm was built on, and to this day we learning  new ways of developing the trade to improve the services we provide to our clients. Over the years we have been involved with some very high profile surveillance investigations, but also some very low profile private investigations. The common factor between them is they all received the same level of professionalism and excellent service we aim to provide.

Standards of Our Private Detective Agency


Sentry Private Investigators operate with strict confidentiality with all private investigator services. We ensure the personal data distributed to us is managed in accordance with GDPR  and data protection requirements.


We ensure our private investigator services are legally compliant at every level. Sentry Investigations Ltd have the knowledge and expertise to conduct professional and ethical private investigations whilst operating lawfully.


SPI satisfy thorough Data Protection Impact Assessments (DPIA's) prior to any and all private investigations. This is to ensure the investigative course of action is justified and proportionate to the nature of the enquiry.

Find Out More About Our Private Investigator Services

One of the unique aspects of private investigations is that no two cases are the same. We receive enquiries revolving around similar situations, cohabitation investigations or fraudulent workplace injury claims for example. However, circumstances are always different, the people we investigate are always different, and the environments we operate in are always different. The fact that all private investigations are different is exactly why clients need reliable private investigator services to deliver the evidence they are seeking. Trained and experienced private investigators know how to adapt to the differences, environments, people and situations to ensure we achieve our objectives.

SPI operate with a trusted network of private detectives who are trained to deliver expert services in all situations. What makes us a professional and versatile private detective agency is that we accommodate, adapt and deliver results in a proportionate and ethical manner.


To find out more about how we can support you, or your company with our tailored private investigator services, get in touch with SPI by calling us on 01217691626, or email us at

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