They didn't though.
He became PM through an internal Tory vote for a leader, after the previous PM stepped down. She became leader in exactly the same way and had only lasted a seven weeks since her predecessor was forced to quit.
The Tories are truly awful, and their choice of leaders has shown that.
If you or a friend has a PS5 with a PS Plus Premium subscription, you can trial the game for two hours. Your progress will transfer over if you decide to buy, but that's as close as you're going to get to a demo I think.