The defamation case in the UK is scheduled to go to trial in November. This defmation case, in the US, I don’t know the schedule.
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Since Devin Nunes has confirmed that FVEY was not officially involved with the dossier, is there any hope that more of the UK players would be revealed with these lawsuits?
Off the top of my head, I think not. Defendant is Buzzfeed, and it's up to them to prove the allegations they published are true. The allegations involve the chain of Fusion GPS, Steele, and "sources." Unless Steele says he was put up to it by somebody other than Fusion GPS, I don't see UK coming into the case.
Other actions, namely involving Papadopolous and Page, appear to implicate foreign spooks as well as US/CIA spooks, with action and phony evidence being laundered and fed to FBI/DOJ and Congress in order to create and perpetuate the Russian Collusion allegation.
Another thought, I don't know whether or not any part of the dossier establishes any Russian collusion anyway.