Peter Bruce Lilley, Baron Lilley, PC (born 23 August 1943) is a British Conservative politician who was a Member of Parliament (MP) from 1983 to 2017 representing the constituency of Hitchin and Harpenden from 1997 and, prior to boundary changes, St Albans.
He was a Cabinet minister in the governments of Margaret Thatcher and John Major, serving as Trade and Industry Secretary from July 1990 to April 1992, and as Social Security Secretary from April 1992 to May 1997, when he introduced Incapacity Benefit.
On 26 April 2017, he announced his retirement as an MP.
He has been a long term critic of the European Union and backed Brexit in the 2016 United Kingdom European Union membership referendum.
Lilley has since been supportive of the Eurosceptic pressure group Leave Means Leave.
In May 2018, he was nominated for a peerage in the House of Lords.