They must have been aware of Fordham as UEFA spoke to us about it in 2014 or 2015. As the PL act as the FFP licensor, they were surely either involved or at least aware of these discussions. And Fordham was visibly linked to City, specifically the Manchester City Sports Image Rights company, on the Companies House website. It's inconceivable that the Der Spiegel articles were the first they'd heard about Fordham.
I'd have thought if we could show that the PL were acting under pressure from certain clubs, following the pretty definitive CAS outcome, that would have some impact on our case and that it was potentially vexatious rather than principled.