New Delhi, June 22 -- Keir Starmer announced his resignation as the Prime Minister of the United Kingdom and the leader of the Labour Party on Monday. In an emotional speech, Starmer said he is leaving the "biggest job." He also set out a timetable for his departure and said the new PM could take over by September.

How will the new UK PM be decided? Who are the main contenders and what's next for Starmer? Here's all we know:

As Starmer resigns, the next step involves the process of electing a new Labour leader, who will also become Britain's 7th prime minister in just 10 years.

In his speech outside 10 Downing Street, Starmer said he would ask the Labour Party's organising committee to set out a timeline for a leadership contest to fin...