Labour-backing unions could force the party to accept the internationally-recognised definition of antisemitism, it has been reported.
Unite, Unison and the GMB - which donate millions to the party - are paying for lawyers to examine the International Holocaust Remembrance Alliance (IHRA) so they can reassure the party over adopting it, the Sunday Telegraph reports.
The paper quoted a "senior party source" as saying: “The big trade unions – Unite, GMB and Unison – will come behind an adoption of it… it will be facilitated onto the agenda. By October everything will be done and dusted and people will wonder what it was all about."
The party's failure to adopt the IHRA definition, opting instead for a watered-down version, has triggered a huge standoff with its Jewish MPs and supporters.