Anushka Asthana is joined by Boris Johnson’s biographer Sonia Purnell to discuss the foreign secretary’s 4,000-word intervention on Brexit this week. Plus: the Labour chair Ian Lavery on changes to the party’s leadership election rules. On the panel: Gaby Hinsliff, Paul Mason and Richard Angell

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Boris Johnson’s 4,000-word Brexit intervention was widely interpreted as a pitch to replace the prime minister. The fallout dominated a week in which Theresa May will give her biggest speech on Brexit yet.

Joining Anushka Asthana to discuss it all are Richard Angell, director of Progress, and the Guardian columnists Gaby Hinsliff and Paul Mason.

We hear from Sonia Purnell, who used to work alongside Boris Johnson as a journalist in Brussels and has written a less-than-complimentary biography of the foreign secretary.

Also this week: Jeremy Corbyn will usher through party rule changes to make it easier for the next leader to come from his wing of the party. Two years into his leadership, is he finally in full control of Labour? We hear from the party chair, Ian Lavery.

As May prepares to return to Britain before Friday’s speech, Heather Stewart has been following her trip to Canada and the United Nations in New York. But has Johnson’s article forced her to change her speech?

And finally: the Liberal Democrats have been gathering in Bournemouth this week. Jessica Elgot reports from a party conference energised by its opposition to Brexit.

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