Complaint / Committee declined to take further action on complaint / enduring power of attorney / complaint donor not mentally competent to execute EPOA / Lawyers and Conveyancers Act (Lawyers: Conduct and Client Care) Rules 2008, rule 3 / Den v Vancleve (1819) 2 Southard 660 / Re K (Enduring Powers of Attorney) [1988] 2 WLR 781 / Hoff v Atherton [2004] EWCA Civ 1554 / Simon v Byford [2014] EWCA Civ 280 / HELD / complaints process does not offer parallel jurisdiction for determination of professional negligence / no clear-cut evidence of professional standards issue / earlier medical report complainant relies on was not made available to lawyer / Committee’s decision confirmed / section 211(1)(a)