O2 (Telefónica UK) is the commercial brand of Telefónica UK Limited and is a pioneer digital communications company. Services include Telecoms, Data Network, Roaming, Fixed Line, Mobile Landline, Email, and Applications.

Oak View Group are here to be a positive disruption to business as usual in the sports, live entertainment, and hospitality industries. Oak View Group has assembled a world class group of equity investors who believe in the company's bold vision for the future of sports and entertainment.

Oakdoor™ Hardware-Enforced Security Solutions provide uncompromising protection to data, safeguard sensitive information, and guard critical networks. With robust security features, seamless integration, and compatibility with existing infrastructure, Oakdoor solutions provide a critical layer of protection against cyber threats – enabling organizations to remain compliant, mitigate risks, and safeguard their valuable assets.

Oakpark Alarms specialises in installation and maintenance of of access control, CCTV, fire alarms etc. The company offers services both commercial and domestic locations. Oakpark Alarms cover all areas of Dorset, Hampshire, Berkshire, West Sussex and Wiltshire as well as providing commercial systems over a wider area still. The company ability to certify installations resultant from their membership of the SSAIB and BAFE approval.

Oakpark Alarms Security Services Ltd specialize in the Design, Supply, Installation,Service and Maintenance of Intruder Alarms, CCTV, Door Access, Fire Alarms, Emergency Lighting, Fire Extinguishers, Fire Suppression Systems and Automated Gates, Barriers and Bollards, Perimeter Security and Fencing. Based in Winslow, the company work varies from garden sheds to Hotels.

Oaks CCTV Limited designs, install, and maintains specialist CCTV solutions for industrial, commercial and domestic properties throughout Norfolk, Suffolk, Cambridgeshire and East Anglia. The company was established in 1996. Oaks CCTV also conducts on-site surveys to determine how to best match the customer's needs with the latest range of CCTV technologies available.

Obsidian Security is a leading supplier and installer of electronic security systems and fire alarm systems to commercial and industrial premises and public buildings such as schools and hospitals.

OCS Security Services specilaises in manufacturing and installing CCTV, alarms systems, access control systems. The company also provide a fully integrated electronic systems and manned guarding solution under a single management structure. Based in Crawley, OCS Security Services provide a full security solution to offer security surveillance and protection of personnel and property.

Octagon Ltd offers installation and maintenance services of security systems such as CCTV, alarms systems, door entry, access control, perimeter security, and security lights etc. Based in Greater London, the company's team is highly skilled and is equipped to provide an efficient and quick service. Octagon Ltd brand is instantly identifiable and trusted.

The primary communications regulator in the UK, Ofcom regulates the TV, radio and video-on-demand sectors, along with fixed-line phones, postal services, cellphones, and the airwaves used by wireless phone and internet network operators. It is Britain’s government-approved regulatory and competition authority for the broadcasting, telecommunications and postal industries.

Having worked for a number of years in the security systems industry, Oliver Law works with the aim of providing high quality, reliable and professional security services for a wide range of commercial and industrial establishments.

Omnia Security provides a range of security and cleaning services to corporate, private and public sectors. The service portfolio of the company covers corporate security, retail security, residential security, door supervision and closed protection apart from risk assessment and medical escort services.

OmniPerception, a private British company founded in 2001, is a global supplier of computer vision capabilities, specializing in facial biometrics and advanced image processing. The company’s software provides automated solutions for the recognition of objects and people in a wide range of customer applications – offering significant added benefits in performance and reliability.

One Stop Alarmed Security offers an extensive range of security services provided by their team of professionally trained security officers. Their aim is to provide a service that leaves their client whether, personal, corporate or business relevant to feel 100% secure and protected.

OneID® is an organization building trust for a safer online society. It let individuals prove who they are online easily and securely using bank-verified data, making verifying the customers hassle-free.

Online Security Products specialises in the supply and distribution of products used in the electronic security industry. The UK based company supplies CCTV, access control, door entry, fire, intruder alarm, and DVRs etc.

ONVU Technologies is a privately held group with a combined experience of over 25 years in the global IT industry and offices in UK, US, India, Turkey and Switzerland. The ONVU Tech Group collaborates with industry experts to build empathy-led solutions, created by industry experts to solve real industry problems. Its businesses create valuable video and data-led cutting-edge solutions that enable global partners make informed decisions.

At Onyx Security Group, their manned guarding services offer a robust and reliable on-site security solution tailored to the business or property. They deploy fully SIA-licensed and rigorously vetted officers who bring experience, professionalism and acute awareness to every assignment.

Opem Security is a pioneer, London based, security systems provider. They specialize in delivering the design installation, monitoring, and maintenance for CCTV and access control, as well as an offering out-of-hours concierge support and facilities management.

OIX is a community for all those involved in the ID sector to connect and collaborate, developing the guidance needed for inter-operable, trusted identities Through the definition of, and education on Trust Frameworks, creating the rules, tools, and confidence that will allow every individual a trusted, universally accepted, identity.

OpenView Security Solutions Limited is an independent security systems integrator providing full security systems package and a comprehensive range of services for the customers. The company designs, installs, and maintains security systems including access control, CCTV, intruder alarm, integrated security systems, door entry systems, etc.

OpenWorks Engineering is a hi-tech product company developing security and counter-terrorism products. OpenWorks has developed an award-winning and innovative drone capture and autonomous optical detection and tracking technology. The systems offer law enforcement and security forces the capability to protect the people, VIPs, secure facilities, and critical national infrastructure.

Oprema are multi-brand distributors of CCTV, IP, Fire, Access Control & Data Products. Oprema supply quality products at competitive prices and are currently the sole UK distributor of the outstanding Olix range of CCTV products. Their professional and friendly approach to business coupled with their market leading customer service and technical support make them stand out from the average security distributor.

Oprema is a distributor of CCTV, access control, intrusion, fire and networking products in UK. They are a premier distributor of Dahua products in the country and have more than 50 market leading brands such as such as Advanced Electronics, Apollo, Comelit, Milestone, Morpho, PAC, Paxton, Pyronix, Samsung, HID, Vanderbilt, to name a few, as their partners.

Optec specialises in delivering end-to-end cybersecurity solutions and services designed to proactively protect the business. They provide cybersecurity, digital transformation, email security, network security, application security, cloud, infrastructure, remote work, data backup and much more.

Optilan is a UK based telecommunications systems integrator providing 'turnkey' communication systems from design through to site commissioning and support to customers around the world. The company offers its services to businesses, industry and governments around the world. Optilan provides integrated security systems that incorporate CCTV, access control, alarms, perimeter intruder detection, radio systems, transmission systems, cabling, etc.