Interesting, I watched a similar documentary from the GE side and I was under the impression that both companies were making composite fan blades. I guess that may just be GE while RR makes the hollow titanium blades (which are pretty amazing).
GE supplies engine to A380 through joint venture with Pratt and Whitney. That engine is GP7000 and it also uses hollow titanium blades, just like Trent.
Also I was curious why they didn't user any advanced ceramics in the turbine considering the temperatures involved, instead they used metal with cooling holes (and underlying heat sink structures).