The second May ministry was formed on 11 June 2017 after Theresa May returned to office following the June 2017 snap general election. The election resulted in a hung parliament with the Conservative Party losing its governing majority in the House of Commons. On 9 June 2017, May announced her intention to form a Conservative minority government, reliant on the confidence and supply of the Democratic Unionist Party; a finalised agreement between the two parties was signed and published on 26 June 2017.

The Conservative–DUP agreement between the Conservative Party and the Democratic Unionist Party (DUP) followed the 2017 United Kingdom general election which resulted in a hung parliament. Negotiations between the two parties began on 9 June, the day after the election, and the final agreement was signed and published on 26 June 2017.