The Observer.

Hello, it's Matt here, and you're listening to the slow newscast from The Observer.

This week, a summer of disarray.

The rise of reform has prompted some to wonder if a similar contender might

emerge on the left. And for a moment, it looked like there might be. Former Labour leader

Jeremy Corbin, Zara Sultanar, also an MP cast out by the party, sought to take on their

former colleagues by creating a new political movement.

With Jeremy Corbyn's brand recognition, it looked briefly like the left had its own upstart to challenge the status quo.

The duo set out to create a fresh democratic take on the establishment and called it your party.

Except, several months on, Mired in controversy is not even formally a political party

yet. And a new rival from the progressive left has emerged. So, has your party missed its chance?

What happened to it over the summer? My colleagues Ada Barumet and Madeline Parr investigate.

Over to Ada.

The lights are dimmed.

Some of the flags are out and I'm a bit worried we're going to have to sing the album.

In the final few people take their suits, we will start.

A few weeks ago, I spent a Saturday evening in a lecture hall in central London.

I was there for a political rally. The first thing is to say hello and welcome to the Socialism 2025 rally.

Thank you. and welcome to the Socialism 2025 rally. The room was only two-thirds full, but with a sea of red flags and rousing optimism, it felt fuller.

A huge screen at the back of the stage presented the evening's main question.

How can your party be a party of working class struggle and socialism?

Your party is the latest political vehicle for a new leftist movement in British politics,

...