Relx, Wolters Kluwer tumble on Claude legal plug-in
** Shares in European software companies that provide services to legal industry fall heavily on Tuesday ** Britain's RELX REL.L down 7%, Netherlands' Wolters Kluwer down 7.2% ** Trader attributes move to Anthropic's release of legal plug-in for Claude ** RELX shares on track for biggest one-day fall since April, down 43% from record in February 2025 ** Wolters Kluwer shares down 58% since February 2025 peak (Reporting by Samuel Indyk and Danilo Masoni; Editing by Amanda Cooper)