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private investigator London
Association of British Investigators Membership


You have suspicions, our London private detectives get the evidence.

Private Investigator London

Private Detectives in London


Sentry Private Investigators in London offer confidential surveillance and investigation services to both private and corporate entities. We carefully tailor investigations on a case by case basis to ensure provision of the most appropriate and cost effective means of service to effectively gather irrefutable evidence. With over a decade of operational experience within London, SPI have built positive relationships and a reputation for achieving excellent results by revealing hidden truths for our clientele. Our objective is to support people experiencing hardships who are in need of answers, but to ultimately take back control of their situations.




Private Investigators UK - Industry Professional Associations

Association of British Investigators Logo

Association of British Investigators

armed forces covenant Logo

Armed Forces Covenant Bronze Awarded

institute of professional investigators

Institute of Professional Investigators

Confederation of Private Investigators UK Logo

Corporation of Professional Investigators 

UK PIN logo

UK Private Investigators Network

London Private Investigation Surveillance Services

Contact a Private Investigator in London at SPI Today
Discreet, Cost-Effective Private Investigators in London

Sentry Private Investigators in London operate with strict confidentiality at all times. We understand the need for discretion and we deliver outstanding results without detection. Our investigative services are tailored to case requirements but always with the client's budget in mind. We work with our clients to ensure services are cost effective yet competitive against other private detective agencies in London. The cost of a private investigator in London can vary significantly depending on who you approach. SPI have taken this into serious consideration and regularly monitor the industry to ensure our rates are set apart from others.

Values and Standards of a Private Investigator in London


Our private investigator London services are delivered with integrity and professionalism on all accounts


Our private investigations are conducted with robust ethical standards and accountability at all levels


The private investigator London services we provide are in compliance with UK privacy and data protection laws


A quality service at a cost effective price is what we deliver with both our private investigations and corporate investigations

Hire a Registered Private Investigator in London

Sentry Private Investigators Ltd are a registered organisation with the Information Commissioner's Office (ICO). Additionally, we hold accredited membership with the UK Professional Investigations Network (UKPIN), the Association of British Investigators (ABI) and the Institute of Professional Investigators (IPI). In an unregulated industry, it is vital to ensure your private investigator in London is accredited and operates in a legally compliant manner. With SPI, you can be assured we tick all the legal boxes. We operate in compliance with UK privacy laws and data protection legislation where unfortunately many other P.I agencies in London do not. Ultimately, you are in good hands with SPI. if you need the discreet services of a private investigator in London get in touch with us today.

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