Chris Mason: Why did Sunak decide to call summer election?

The general election is on - it will soon be over to you.Power will soon drain from Westminster, and drain from those who currently hold it. Politicians, and their future - but far more importantly the country's direction - will lie in your hands. The prime minister announced the date outside Number 10, with the rain pouring down and music blasting from just outside the Downing Street gates.

The song? An old hit from the 1990s, D:Ream's Things Can Only Get Better which you might remember from Tony Blair's era.For weeks there had been a growing expectation the election would be held in the autumn, giving the prime minister at least two years in office and giving the economic outlook a greater opportunity to improve.A very senior government figure told me just days ago "there is no reason to be getting excited" when I was part of a conversation about a summer election.

I spent more than an hour in conversation with another very senior Conservative just yesterday where the whole thing was framed around a very long campaign that might still be rumbling when the pumpkins were out and the sparklers were sparkling. But not everybody is in the loop on something like this.Decisions can be on a knife edge - and there have been those pushing Rishi Sunak to go sooner, Deputy Prime Minister Oliver Dowden among them.

Those making that argument felt that things might not improve much and that the perceived desire of the electorate to be given a say soon might risk making any Conservative defeat worse if the appointment with voters was pushed back.