Investigation & Private Detective or Investigator Services in the United Kingdom

ADM International - Services in computer forensics, copyright and trademarks.
AM Investigations - Private investigation agency.
Anglo European Private Detectives Ltd. - Private investigation firm based in Leeds.
Argyll Investigations - Private investigator based in Scotland.
Corporate Investigation Service, Ltd. - Private detective and security services.
D.A.C. Group Ltd. - Investigators, collectors and civil enforcement agents based in Durham, England.
Finlays Bureau of Investigation Ltd - Private investigator and detectives.
Fintecs Investigation - Liverpool based fraud and surveillance firm working for insurance companies, corporate,legal and private clients.
Global Intelligence Services - Insurance fraud investigation, asset tracing, and strategic business intelligence. Based in Kent.
Grenadier Investigation Services - private detectives with offices in Derby and Nottingham.
Hides Detective Agency - Investigative agency based in Norfolk.
IIG Associates - Investigations and intelligence agency based in London.
International Legal Network Ltd - London detective agency providing a wide range of services.
J J Associates - Commercial investigators and process servers.
John F. Hope & Co. - Private investigators with offices in Worcestershire and Birmingham.
KIS Detective Agency - Private investigator and fraud specialist.
LRI Research Ltd - London based investigative firm.
MC Eden & Associates - Service to the legal and insurance professions, and to commercial clients.
Moore & Associates - Specialist risk consultants serving the corporate community.
Pegasus Investigations - Private and commercial investigation.
Peter Reay Security Consultants & Special Investigations Limited - Full service investigative agency based in Richmond.
Richard Day & Wilson - Corporate and commercial invesigators, surveillance and undercover operations.
Surveillance Services - Private investigations agency located in Ormskirk, Lancashire.