Act 2011 ('the act'), the Metropolitan Police Authority was abolished and replaced with the Mayor's Office for Policing and Crime. On 6 June 2012, Greenhalgh was appointed, by Boris Johnson, to head the MOPAC, as the second Deputy Mayor for Policing and Crime. To take up this position, Greenhalgh resigned from his roles as Council leader and Councillor and was succeeded as leader by Nick Botterill. Although Greenhalgh was no longer an elected official, the Mayor was permitted to appoint him by sections 19 and 20 of the act. In February 2014, Greenhalgh publicly endorsed Johnson's proposal to equip the police with water cannon to be used in the event of a serious outbreak of public disorder. However, the water cannon bought by Boris Johnson for £322k were sold for scrap for just £11k having never been used after the Conservative Home Secretary, Theresa May, banned the police from using them. In December 2014, Greenhalgh became the third declared candidate for the Conservative Party nomination in the 2016 London mayoral election. On 18 March 2020 Boris Johnson appointed him as an unpaid joint Minister of State at the Ministry of Housing, Communities and Local Government and the Home Office. House of Lords On 16 April 2020 he was created Baron Greenhalgh of Fulham in the London Borough of Hammersmith and Fulham. In July 2022, he resigned as a minister during the government crisis. Controversy Greenhalgh caused controversy when police were handed a dossier arguing that between late 2010 and the summer of 2012 officers of the council he headed had promised an "early movers list" or "VIP list" of residents preferential treatment in the allocation of replacement homes if they gave their backing to the estates' being knocked down. The dossier argued that offering such inducements would amount to the offence of misconduct in public office. Greenhalgh was also the subject of controversy in the first months of his appointment as the Deputy Mayor for Policing and Crime. He apologised after a colleague stated that he had patted her on the bottom, although she apparently did not make an official complaint, and although he said he had no recollection of the alleged incident. Greenhalgh sacked both the Chief Executive and Deputy Chief Executive of MOPAC, with both of them being subject to non-disclosure agreements. He also had difficult relations with members of the London Assembly. However, Greenhalgh has also been