Irwin Mitchell

Irwin Mitchell, one of the UK's largest general practice law firms, faced growing pressure to improve lawyer efficiency without compromising the accuracy and citation standards that legal practice demands. As the firm pursued an ambitious digital transformation strategy aimed at delivering a market-leading client experience, its lawyers were spending significant time on routine legal research and first-draft work — hours that could otherwise be devoted to higher-value client matters. Finding an AI solution that could integrate cleanly with existing legal research workflows, rather than requiring a wholesale technology overhaul, was critical to avoiding adoption friction across a large, complex firm.

Irwin Mitchell selected Lexis+ AI from LexisNexis, building on its existing relationship with the platform's practical guidance and legal research content. The implementation layered large language model and generative AI capabilities directly onto Irwin Mitchell's established Lexis+ legal tech stack — minimising disruption while expanding capability. Lawyers gained access to four core AI-powered workflows: conversational natural language search returning cited and linked answers; case law summarisation on demand; generative first-draft assistance for contract clauses and client communications; and secure document upload and interrogation for rapid extraction of key insights from firm documents. Partnering with an incumbent trusted vendor — LexisNexis UK & Ireland — allowed the rollout to proceed without requiring lawyers to learn an entirely new research environment.

Early benchmark data from a November 2023 survey of Lexis+ AI users in the US market, cited at launch, provided concrete efficiency projections for the firm's rollout:

• 74% of early users estimated saving 7 hours per week on legal research
• 80% of early users estimated saving 6 hours per week on legal drafting

Beyond the headline time savings, the implementation shifted lawyer workflow toward higher-value client work by reducing the burden of routine first-draft and research tasks. Eleanor Windsor, Partner and Director of Knowledge Management, noted the firm's goal of maximising the value of legal intelligence already accessed through LexisNexis — with AI accelerating rather than replacing that expertise.

• Build on existing vendor relationships — deploying AI within a trusted, familiar platform reduces adoption resistance and compresses rollout timelines in large professional services firms.
• Cited answers are non-negotiable in legal AI — any AI tool used for legal research must return verifiable, linked sources to meet the accuracy standards practitioners and clients expect.
• Generative drafting captures the highest time savings — first-draft clause and communication generation addresses one of the largest time sinks in legal work, making it a priority use case for AI investment.
• Benchmark with real user data before committing — Irwin Mitchell's reliance on early-adopter survey data to set efficiency expectations is a replicable model for other firms evaluating AI business cases.