Midland Investigations Private and commercial investigators.

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.

Peter Smith International Investigator Services include missing persons tracing, surveillance, litigation intelligence, and travel security advice.

SIASS Investigation and Security Services Provides bodyguard, investigation, surviellance services, undercover operatives, legal support services, and chauffeur services. Based in Newcastle upon Tyne in the U.K.

SIP Services International Offers corporate and private investigations, protection, debugging, surveillance, forensic, and polygraph testing.

South East Investigations Supplies a range of specialist services to private, corporate, and legal clients.

Surveillance Services Private investigations agency located in Ormskirk, Lancashire.

UK Private Investigators Network of U.K. private investigators based in Cambridgeshire offering a worldwide service. Includes missing persons, matrimonial surveillance, pre-nuptial and pre-employment screenings, and more.

UK Research Bureau Limited Offers private investigator and detective services for corporate investigations. Find a missing person, hire spy surveillance equipment, or listening devices for business intelligence research.

WM Associates Offers security, investigation, and information services to the legal profession, insurance companies, financial institutions, and personal clients.