2019 Conservative Party leadership election
The 2019 Conservative Party leadership election was triggered when Theresa May announced on 24 May 2019 that she would resign as leader of the Conservative Party on 7 June and as Prime Minister of the United Kingdom once a successor had been elected. Nominations opened on 10 June; 10 candidates were nominated.
Source: Wikipedia — 2019 Conservative Party leadership election (CC BY-SA 4.0)