Rishi Sunak became the UK's third Tory Prime Minister this year on October 25, following Liz Truss' resignation after just 44 days in office.
In the initial leadership contest, which concluded on September 5, Mr Sunak and Ms Truss battled it out for the role as PM after Portsmouth North MP Penny Mordaunt was voted out of the race.
In the second leadership contest of the year, which ended on October 24, Mr Sunak became the next PM as he reached over 100 backers by 2pm, with Ms Mordaunt losing the competition for a second time.