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Hello and welcome to this edition of The Westminster Hour with me, Ben Wright, and my guests.

Coming up, MPs return from the half-term heat wave to the Hot House of Westminster

and further debate about the Prime Minister's predicament, a potential leadership challenge and the future direction of the Labour Party.

We'll be discussing that and asking what is progressive politics and what are the policies parties of the left could unite around.

Plus, when public bodies fail, why is it so hard for the people affected to get the compensation they're due?

I have been speaking to a former sub-postmaster caught up in the horizon scandal ahead of a Commons Committee hearing.

First, let's meet my panel.

Labour backbencher and Kea Starma loyalist Jack Abbott, former Cabinet Minister John Glenn, now a key aide to the Conservative leader

and Liberal Democrat spokesperson, Pippa Hailings.

The would-be MP for Makerfield

and leadership hopeful Andy Burnham

has promised a different way of doing politics.

I've been to a conference of his progressive fellow travellers

to find out what that might mean.

I think it's incumbent on everybody to come to the table and find areas where we can find

common ground. The way that people voted at the last election showed that there is no longer

support for a two-party system. And when public bodies fail, why does it take so long for the people they've harmed to get justice and redress?

An influential commons committee is asking just that.

We'll hear from a former sub-postmaster and victim of the Horizon scandal

about the long-running battle for compensation from the post office.

The legal fight and the drive to drive down claims has been ridiculous, absolutely crazy.

...