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Nationwide Investigations Group

Private Investigators

Established 1963
  • 020 7649 9415 020 7649 9415
  • 020 7649 9415 020 7649 9415

Private Client Investigation Services

When individuals and families come to a private investigator, we understand it will be at one of the most difficult and challenging times in their lives.

At Nationwide Investigations Group we aim to provide stability, certainty, and direction when it feels like there's nowhere left to turn. Our clients include private individuals, families, business leaders, politicians and celebrities, coping with the stress of blackmail attempts, matrimonial investigations, probate or missing persons cases. 

Whatever the circumstances you find yourself in, we're here to help, with a comprehensive range of private investigator services and expertise to track people, money, and information anywhere in the world. Based in London with agents in kay UK cities including Leeds, Liverpool, Edinburgh, Glasgow, Cardiff, Birmingham and Manchester, our reach extends internationally through a network of associates and partners who have worked alongside us for decades.

Guaranteeing absolute confidentiality, integrity, and ethics in the handling of every private investigation, we always aim to deliver exceptional results, and detailed answers to your questions.

Contact us today

From tracing missing persons to background checks, blackmail investigations and probate research, speak to us in confidence about any private investigation requirements at

020 7649 9415

Our private investigation services for individual and family clients includes:

  • Tracing missing persons nationally and internationally
  • Surveillance and observation services
  • Matrimonial investigations, prenuptial and alimony agreements
  • Due diligence research and reporting
  • Full background checks of individuals
  • Asset searching individuals and businesses
  • Blackmail attempt investigation
  • Genealogical research and probate services

Based in London our private investigations team stretch across the UK including major cities like Manchester, Bristol, Cardiff, Liverpool, Edinburgh, Birmingham, and Glasgow, and reach internationally through a network of associate investigators and agencies.

With experience stretching back to 1963, NIG's private detective services team are some of the most experienced in the industry, and work with clients at the highest levels of private, public, and corporate life.