Due Diligence
& Investigations

Our in-depth investigations against both businesses and individuals typically involve a mixture of in-person, phone and online due diligence.

Risk & Intelligence

Our projects include:

  • Financial Investigations
  • Corporate Fraud Investigations
  • Personal Background Checks
  • Business Background Checks
  • Business Intelligence
  • Open-source Research and Analysis
  • Large-scale Crypto Currency Theft
  • Digital Profiling
  • Witness & Asset Tracing
  • Workplace Investigations
  • Child Location Investigation

Investigators from a range of backgrounds

Our investigators share an immense wealth of experience, they originate from a range of backgrounds including the Police, Military and Customs & Excise. Contributing a plethora of contacts, knowledge and tradecraft to our investigations.

Private Investigation

A private investigation can result in more time being dedicated to a case that will generate leads and results that police forces are unfortunately not always able to prioritise.

Guildstone Associates is part of the Black Diamond Group and is able to draw upon the group’s comprehensive resources and experience to support the needs of our clients. Click here to view our Professional Security Services


Black Diamond is a trusted service provider within the industry who specialise in installing and managing superior security systems. Our services are delivered by highly trained security specialists with a depth of knowledge in providing solutions to the Corporate sector, ensuring your business is protected around the clock.

Our integrated approach enables us to provide,cover and support upon request to all aspects and phases of our clients’ operations:

  • Corporate Security
  • Hotel Services
  • Concierge/ Reception
  • Access Control
  • Event Security
  • Mobile Patrols
  • Airport Services
  • Close Protection
  • Technology Solutions
  • 24/7 Control