Formby, a close ally of Corbyn, worked on the report which was intended to serve as an annex to the full submission that is being sent to the EHRC.

It also involved a handful of others who worked in Labour's Governance and Legal Unit – most of whom are also Corbyn allies.
Starmer was given this report last week before it was in the public domain.

After the document was leaked he launched an independent investigation on it.

I now understand an internal investigation into how the document was leaked has also been launched.
Senior figures within the party like Seamus Milne and Karie Murphy provided information, evidence and emails that related to the allegations of antisemitism to aid research for the EHRC submission, but did not help to write this report - the process was managed by Formby.
The research for this report granted the writers access to staff members' emails and they looked at approximately 100,000 while compiling the report.

One source told me they "found more than they bargained for".
In one case a senior Labour staffer had sent themselves their entire WhatsApp conversation history by email - so the researchers were able to access group chats of colleagues at Labour HQ discussing their opinions about Corbyn and Labour’s performance at the 2017 general election
Some of the conversations in the WhatsApp groups were “abusive and inappropriate language about the leader, MPs, Labour members and about other staff”, the report claims.
In a joint statement responding to the report Starmer and the deputy leader of the Labour Party Angela Rayner said: “We have also asked for immediate sight of any legal advice the Labour party has already received about the report..
“In the meantime, we ask everyone concerned to refrain from drawing conclusions before the investigation is complete and we will be asking the General Secretary to put measures in place to protect the welfare of party members and party staff who are concerned or affected by this"
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