Many central banks have, in fact, reorganised internally,  BIS Review 56/2008  3  reducing the number of branches and regional offices, streamlining their internal operations and restructuring their cash processing and services functions. Finally, a challenge, of course, is to constantly improve the interaction, cooperation and exchange of information between the ECB and the NCBs.
This distinction is very important, since the contagion effect can plausibly originate in a very large number of firms, depending on circumstances in financial markets as a whole.