My understanding is that they need to make a complaint first, then if there is a case to be heard it goes to the European Court. They have made a complaint, so that is step 1. From what I've read it could take over a year before there is a decision on whether it should go to court.
I would imagine the complaint is that the UK Government a allowed state aid in the sale of the Ricoh...but that is just a guess. Where that leaves us regards to all this, I don't know.