McSweeney made clear his mission to those gathered in [the Labour Croydon North MP Steve] Reed’s parliamentary office: “to move the Labour party from the hard left when JC steps down as leader and to reconnect the Labour party with the country [and] build a sustainable winning electoral coalition…” He then pointed to a slide of soldiers holding up huge shields, completely covering their bodies. “Operation Red Shield,” he said. The first job, he argued, was to protect supportive MPs from accusations of disloyalty. The next slide zoomed in on a Greenpeace logo. This would be their model, McSweeney told the gathered MPs: soft branding that made them seem warm and cuddly.

After a few months working from a park bench, the group funded a small office in Vauxhall, and soon it reached out to former Labour advisers to work alongside them with a focus on online antisemitism. In an early review, they identified problem posts in hundreds of Facebook groups with links to either the party or leftwing politics. Some of these were aimed at Labour’s female Jewish MPs. They then farmed out the posts they uncovered to journalists who were themselves reporting on rising evidence of antisemitism on the left. Together with a row over whether the party would adopt all the examples linked to the International Holocaust Remembrance Alliance (IHRA) definition of antisemitism, the scandal was becoming increasingly destabilising for Corbyn.

As for the Guardian schmoozing, I witnessed that first-hand. At the time, I was the joint political editor at the newspaper and found myself invited with colleagues to a dinner in a private dining room in the basement of Browns in Covent Garden. We sat on red chairs with gold trimming, set around a long, thin table covered with a white tablecloth, listening to McSweeney, Cruddas, Reed, [Wigan MP Lisa] Nandy and [Birmingham Ladywood MP Shabana] Mahmood tell us about Labour Together’s plans for renewal.

They had brought with them another MP who was just starting to do more with the group – Keir Starmer. The project was pitched, as planned, with the soft, cuddly Greenpeace framing. They neatly side-stepped our more cynical questions about their plans for a future leadership. Alongside me that night was Guardian news editor Dan Sabbagh, who has since told me he immediately wondered if Starmer was their candidate. Even if McSweeney was wondering about Starmer as a possible leader as early as 2017, it was not spoken about and another hopeful also later emerged from the same group. Back then, the mere prospect of an opportunity to either take control of Labour’s leadership or win a general election still felt very distant.