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Trusted Private Investigators & Security Experts
Surelock International is a leading provider of private investigations, security consultations, and training, built on a foundation of unmatched expertise. Founded by Roy Herridge QPM, a former senior officer of the Metropolitan Police, and managed by Ron Harrison, a former Scotland Yard Detective and President of The Association of British Investigators, our team combines decades of experience from law enforcement, military, and corporate sectors. We deliver tailored solutions to protect assets, combat fraud, and ensure client safety through discreet surveillance, brand protection, and advanced security assessments.

Our accreditations with the Association of British Investigators, Association of Security Consultants, and the Anti-Counterfeiting Group underscore our commitment to industry excellence. Trusted by global brands, legal firms, and private clients, we prioritise confidentiality, leveraging cutting-edge technology and proven methodologies to address complex challenges. With a track record spanning high-profile cases in counterfeiting, corporate fraud, and sports investigations, Surelock International remains a leader in safeguarding reputations and ensuring compliance with evolving security standards.
Services
Private Investigations Security Consultations Brand Protection Fraud Investigation Mystery Shopping Test Purchasing Surveillance Services Penetration Testing Martyn's Law Compliance Training
Highlights and features
  • We offer over 30 years of combined experience in law enforcement and private investigations
  • Our team includes former Scotland Yard detectives and military specialists
  • We provide 24/7 emergency response for urgent security crises
  • Our ISO-certified methodologies ensure court-admissible evidence and compliance
  • We maintain partnerships with UK law enforcement and international agencies
Associations and certifications
  • Association of British Investigators
  • Association of Security Consultants
  • Institute of Counter Fraud Specialists
  • Anti-Counterfeiting Group
What people say
Efficient and cost-effective Swift and professional action Invaluable network globally Highly recommended without reservation Exceptional investigative results
Services
Private Investigations
Our private investigations cover corporate fraud, infidelity cases, and missing persons. Former law enforcement professionals utilise advanced surveillance and evidence-gathering techniques to deliver court-admissible results. Clients benefit from discreet operations and expert witness testimony in legal proceedings.
Brand Protection
Specialist brand protection services combat counterfeit goods through marketplace monitoring and test purchases. We collaborate with trading standards and law enforcement to seize 250m+ in fakes annually. Clients receive tailored strategies to safeguard intellectual property and maintain brand integrity.
Security Consultations
Comprehensive security consultations include penetration testing and Martyn's Law compliance. Military-trained specialists identify vulnerabilities in physical and digital systems. Businesses receive actionable recommendations to enhance security protocols and reduce insurance risks.
Mystery Shopping
Our mystery shopping services evaluate customer experiences through in-person, online, and phone assessments. All visits are covertly video recorded to provide objective feedback. Retailers and service providers use these insights to improve staff performance and operational efficiency.
Surveillance Services
Discreet surveillance operations utilise advanced technology for corporate and personal cases. Services include asset tracking, employee misconduct investigations, and insurance fraud detection. All evidence is collected legally and presented in detailed, court-ready reports.
People
Ron Harrison
Managing Director
With 30 years as a Scotland Yard detective and 20 years in private investigation, Ron leads operations and brand protection. Past President of The Association of British Investigators, he specialises in high-profile anti-counterfeiting campaigns and corporate security strategy.
Stewart Brown
Security Consultant
A seasoned security consultant with 30+ years' experience, Stewart specialises in counter-terrorism and crime prevention. He authored UK security codes of practice and advises on Martyn's Law compliance, leveraging Home Office training and BSI committee expertise.
David Roberts
Online Investigator
Dave focuses on digital brand protection, removing counterfeit products from global marketplaces. His bespoke online investigation techniques have secured takedowns for major luxury brands, combining technical expertise with legal enforcement strategies.
Jake Alford
Brand Protection Manager
Jake manages anti-counterfeiting operations for retained clients, conducting physical and digital test purchases. He specialises in marketplace brand protection and online intellectual property enforcement, working closely with trading standards and customs agencies.
Moritz Gregory
Investigator
With 31 years at the Metropolitan Police and 16 years at Surelock International, Moritz handles complex fraud cases. A law graduate and SC-cleared investigator, he has worked on high-profile public inquiries and specialises in covert operations and financial crime investigations.
Questions
What types of investigations do you handle?
We handle corporate fraud, intellectual property theft, employee misconduct, personal investigations, and high-profile security cases using former law enforcement specialists.
How do you ensure evidence admissibility?
Our investigators follow strict chain-of-custody protocols, use calibrated equipment, and maintain detailed documentation to ensure all evidence meets legal standards.
Can you assist with international cases?
Yes, we operate globally with established networks in Europe, Asia, and the Middle East, working alongside local authorities and Interpol when required.
What security assessments do you offer?
We provide Martyn's Law compliance checks, penetration testing, CCTV audits, and physical security evaluations tailored to business size and risk profile.
How are investigations billed?
Most services operate on hourly rates with upfront cost estimates. Complex cases may require retainer agreements, with regular progress updates provided.
Do you offer emergency services?
Yes, our emergency response team is available 24/7 for urgent security threats, asset recovery, and crisis management situations.