The practice rules that set out when and how solicitors in England and Wales could carry on incidental “investment business” alongside legal work. Issued by the Law Society as a recognised professional body under the Financial Services Act 1986, the Solicitors’ Investment Business Rules 1995 (SIBR 1995) governed areas such as the scope of permitted investment activities, client status and risk disclosures, suitability and execution‑only business, conflicts and commission disclosure, referrals and introductions, financial promotions, training and competence, and record‑keeping.
The term refers to this specific rulebook rather than a statutory definition. It is chiefly encountered in legacy file reviews, limitation‑period claims, disciplinary history, or when interpreting client care and commission arrangements predating the Financial Services and Markets Act 2000 (FSMA).
The SIBR 1995 have been superseded in England and Wales by the FSMA designated professional body regime and the SRA Financial Services (Scope) Rules and SRA Financial Services (Conduct of Business) Rules. Scotland and Northern Ireland had their own, broadly equivalent, Law Society investment business rules under the 1986 Act. The Republic of Ireland operates a separate regulatory framework for investment services (under Central Bank regulation), so the 1995 rules did not apply there.