Case Study: TalkTalk halves its legacy estate with Capgemini

How TalkTalk halved their legacy estate

TalkTalk, a major UK telecommunications provider, faced significant challenges after years of acquisitions left it with a complex legacy IT estate of over 1,000 codebases, 650 applications, and 750 databases. This unwieldy system was difficult to manage, inefficient, and its vulnerabilities were highlighted by a cyber-attack. TalkTalk partnered with Capgemini to undertake an ambitious modernization and security transformation program.

Working with TalkTalk, Capgemini helped implement a cultural and technological transformation that empowered the internal engineering team. This included a novel incentive scheme for engineers to propose and implement improvements. Capgemini delivered a robust Salesforce CRM implementation, re-platformed systems, and drove the decommissioning of legacy applications. The results were achieved within 18 months, including a 50% reduction in the legacy codebase and applications, multi-million pound savings, and an 85% reduction in major incidents, creating a more resilient and innovative IT environment.

TalkTalk

Philip Clayson

Technology Director