Hey,
I don't have any information about the british carriers, but i wouldn't consider lh cityline as an option. LH Labour agreement says, that pilots who didn't attend the LH Flightschool in Bremen are not allowed to fly playnes with > 90 PAX. At the moment they fly the CRJ900, but that will change in the future. To my knowledge Bremen guys fly the EMB at Cityline.
When living in Germany and speaking a decent German, why don't give it a try for the LH MPL course. It's probably one of the best deals in europe.