Americans get too excited when they read headlines like this. Nobody voted for Rishi, they voted for the Tories what felt like a decade ago. The Tories have had a revolving door policy, and new rubes keep taking the PM position after the last one leaves/is forced out. Some portion of that 70% are Tory voters who just want another spin on the PM wheel.
Last election was in 2019, and they’re usually every 5 years. The next one has to be set for no later than January 2025, but could be earlier than that.
Ummm.... Why the variable timeline? I don't really understand US politics, and I'm an American. I've no hope of really understanding the UK system... Still, how do you not just vote in a new government/PM/MPs on a set schedule? That's the most not British thing I've ever heard of. I thought you guys love routines.
Ok, but why does the same party stay in power if a vote happens early? Seems like the conservatives have had control of England for the last 40-50 years, basically since Thatcher.
"New Labour" as it was branded under Blair, was basically a more right leaning Labour. Brown was Chancellor to Blair and took over after his resignation, much like everyone since Cameron (who himself was initially elected as leader of a coalition to a hung parliament).
So, voters elect Members of Parliament during general elections not a prime minister, the political party that wins the most seats in the House of Commons usually forms the government. Since we don’t elect the PM the king ‘invites’ the leader of the majority party to form a government since they’ll likely have the support of the majority portion of MPs, that person becomes the prime minister.
This leads to the slightly unusual situation where the incumbent party can essentially decide to replace the prime minister at will, this is usually accomplished by either an internal party process (1922 committee for the Conservative Party) or if the prime minister decides to ‘resign’. The incumbent party can then elect a party leader using whatever process they like iirc, once they have chosen a leader the king asks that person to become prime minister.
tl;dr the uk electorate don’t choose the prime minister directly, you elect a local MP, and the party leader of the majority party becomes PM so replacing the party leader replaces the prime minister.
ETA: the government can call a general election early and have done in the past but it’s not always in their best interest if they think they’re going to lose