He was created a
Life Peer on 29 July 1998, taking the title
Baron Warner, of Brockley in the London Borough of Lewisham. From 1997 to 1998 he was Senior Policy Adviser to
Home Secretary Jack Straw, and remained an adviser to Government on family policy after being appointed to the House of Lords. Warner was
Parliamentary under-secretary of state in the
Department of Health from 2003 to 2005, and a
Minister of State at the
Department of Health from 2005 to 2007. He was appointed to the
Privy Council in June 2006, and was sworn in on 19 July 2006. In August 2010, Warner was appointed by the
Conservative–Liberal Democrat coalition government as a commissioner on the Commission on Funding of Care and Support, which was chaired by
Andrew Dilnot. The commission was asked by the government to review the way in which social care is paid for in England. It recommended that people's lifetime costs should be capped, with the government paying any further costs above the level of the cap. In June 2014, Warner was appointed as a commissioner to oversee improvements in
Birmingham City Council's Children's Social Care services, following a poor review by Professor
Julian Le Grand. In October 2015, Warner resigned the Labour whip in the House of Lords and became a
non-affiliated member. In a letter to the Labour leader,
Jeremy Corbyn, he wrote that Labour was no longer "a credible party of government-in-waiting... Labour will only win another election with a policy approach that wins back people who have moved to voting Conservative and Ukip, as well as to Greens and SNP. Your approach is unlikely to achieve this shift." ==NHS controversy==