After the Labour Party's loss in the 2010 general election in May 2010, Myners remained in the House of Lords. Until 2014 Myners served as a backbench Labour peer, before resigning to sit as a
non-affiliated member and from 7 July 2015 as a
crossbencher. Myners joined the board of
RIT Capital Partners PLC, an investment fund chaired and sponsored by
Lord (Jacob) Rothschild, and later that year he became a Trustee of ARK, the charity supported by London's major hedge fund managers. In February 2011, Lord Myners became chairman and a partner of Autonomous Research LLP, an independent equity research firm. In June 2011, Lord Myners became chairman and a partner of Cevian Capital (UK) LLP, the UK arm of Cevian Capital, the largest active ownership (or activist) manager in Europe. In October 2012, Lord Myners was appointed President of the Howard League for Penal Reform, replacing the outgoing
Lord Carlile of Berriew QC. In March 2013, Lord Myners joined the board of OJSC MegaFon, a London-listed company that is one of the three largest mobile operators in Russia. Myners was appointed to represent the interest of independent shareholders and served on the Board until the end of 2017. Lord Myners was the chairman of Platform Acquisition Holdings Ltd, which in May 2013 listed on the London Stock Exchange, raising $905 million earmarked for acquiring a target business expected to have an enterprise value of between $750 million and $2.5 billion. Platform was a Special Purpose Acquisition Company or SPAC (referred to in the US as a blank cheque corporation). He subsequently Chaired a number of other SPACs, including one that acquired the worldwide operations of Burger King and another that bought the European operations of Birds Eye and Findus. In December 2013 he joined the Board of the
Co-operative Group as senior independent director to produce and publish for the members an independent report on governance. The Co-op had been brought close to collapse in that year by losses in its banking subsidiary and suffered from a scandal involving the chair of the Co-op Bank,
Paul Flowers. Myners limited his payment for this work to £1. His report recommended replacing the Co-op's mostly elected board with an appointed one of independent directors with business experience, with the members represented by a National Members Council. The recommendations were heavily criticised from some in the co-operative sector, who described the governance recommendations as "Plc style" On 1 February 2015 Lord Myners was appointed Chair of the Court of Governors and Council of the
London School of Economics and Political Science, succeeding
Peter Sutherland. In 2016, Lord Myners took up role as University Chancellor of the
University of Exeter from Baroness
Benjamin. In 2020 Lord Myners was active in seeking funding for the
Stadium for Cornwall. ==Personal life and death==