From 6/10/10 any complaints about a solicitor in England or Wales will be made to the Legal Ombudsman instead of the Legal Complaints Service.
Legal Ombudsman
Legal Complaints Service
Legal Services Ombudsman
Legal Services Act 2007 (Commencement No. 8, Transitory and Transitional Provisions) Order 2010, on UK Legislation website
Law Society Gazette: Legal ombudsman will take non-legal approach to complaints handling - 8/7/10