Sir Thomas Philip Winsor (born 7 December 1957) is Her Majesty's Chief Inspector of Constabulary, a position he has held since 1 October 2012. He is a British lawyer and economic regulatory professional. Between July 1999 and July 2004, he held public office as the Rail Regulator and International Rail Regulator for Great Britain. On 1 October 2010, he was appointed by UK Home Secretary Theresa May MP to carry out a wide-ranging review of the remuneration and conditions of service of police officers and staff in England & Wales, the first for over 30 years. He was knighted on 19 March 2015.
Winsor was born in Broughty Ferry, Dundee, the third son and fifth child of Thomas V M Winsor and Phyllis Bonsor. He was educated at Grove Academy state comprehensive school, Broughty Ferry. In 1976, he went to the University of Edinburgh to study law. After graduation in 1979, he served his two-year Scots legal apprenticeship with Dundee law firms Thorntons & Dickies, and practised for a year after that doing mainly litigation in Dundee Sheriff Court. In 1982 he enrolled as a postgraduate student at the Centre for Petroleum and Mineral Law Studies of the University of Dundee under Professor T C Daintith, and received a Diploma in Petroleum Law in 1983.
Winsor became a Writer to the Signet (WS) in 1984.
He was employed as a solicitor by the leading Edinburgh law firm Dundas & Wilson from 1983 until 1984, from where he moved to London and joined City law firm Norton Rose, specialising in energy law and project finance. In 1991 he left Norton Rose to become a partner in City law firm Denton Hall, where he worked first on the design and implementation of the regulatory regime for the privatisation of the electricity industry in Northern Ireland.
After the flotation of Northern Ireland Electricity plc on the London stock exchange in 1993, Winsor was seconded to the Government Legal Service as chief legal adviser and general counsel to the first Rail Regulator, John Swift QC. The Rail Regulator was the statutory officer established by the Railways Act 1993 for the economic regulation of the British railway industry, which was about to be privatised. Winsor's secondment lasted two years and he returned to Denton Hall in August 1995. With his partners, over the following four years he built a successful railway and regulatory law practice, working on some of the most important railway projects in the UK, including the financing of the first phase of High Speed 1 and the upgrade of the West Coast main line.