Tialis Essential IT Plc, formerly IDE Group Holdings Plc (Ticker: IDE.L), provides managed IT services, device lifecycle management, and professional services to UK public and private sector organizations. The company offers managed IT support including first to third line helpdesk and on-site engineering; device lifecycle solutions encompassing build, configuration, storage, shipping, and end-of-life resale of end-user devices such as laptops and peripherals; professional services for ad-hoc projects like infrastructure upgrades and deployments; and complementary network, cloud hosting, colocation, hybrid cloud migration, disaster recovery, and cybersecurity services including endpoint protection and managed SIEM. Incorporated in Scotland in 2009 with company number SC368538 and headquartered in Croydon, United Kingdom, Tialis operates primarily in the UK market, serving enterprise-scale customers with a focus on reliability, security, and sustainability, achieving 98% blended SLAs, 99% first-time fix rates for device lifecycle, and an 80% carbon footprint reduction since 2018. Following a strategic and operational review completed in October 2018, the company sold its 365 ITMS subsidiary for £3 million to reduce net debt and refocused on core managed services through IDE Group Manage Limited and IDE Group Connect Limited; it rebranded to Tialis Essential IT Plc, with certain IT listings referring to it under that name while maintaining operations from legacy IDE branding on idegroup.com.