In July 2012 he was selected as the Conservative candidate for the Police and Commissioner (PCC) elections in Hampshire.
In May 2008 in the abortion amendments to the Human Fertilisation and Embryology Bill (now Act), Michael Mates voted for the abortion time limit to be lowered to 20 weeks against scientific and medical consensus which is currently 24 weeks. After four separate parliamentary votes on varying time limits, the majority of MPs voted to keep the abortion time limit at 24 weeks, in keeping with scientific and medical consensus, hence no abortion amendments were added to the bill.
Animals in Medical Research
In 2006, Michael Mates signed Early Day Motion 1850: Animals in Medical Research which noted that "animal research is only permitted where there is no better alternative and that pain and suffering are minimised and balanced against the potential benefit to humans and animals", supported "the building of the new state of the art biomedical research laboratory at Oxford University", condemned "unlawful animal rights extremism, including any violence, harassment or intimidation of those associated with lawful animal research", and supported "the well-regulated use of animals in medical research".
In February 2010, following the publication of the House of Commons Science and Technology Committee's report "Evidence Check 2: Homeopathy", Michael Mates signed Early Day Motion 908: Science and Technology Committee Report on Homeopathy, which was critical of the report.
On 6th May 2008, Michael Mates voted against a Lords amendment to abolish the common law offences of blasphemy and blasphemous libel. The amendment was nonetheless passed by a vote of 378 to 57.
Libel Law Reform
In January 2010, Michael Mates signed Early Day Motion 423 calling for a reform of the English libel law. The motion noted that human rights activists, scientists, writers and journalists are currently prevented from publishing, and the public prevented from reading, matters of strong public interest due to the chilling effect of the law.