Nothing in ERSA about ringing BK tower, you're supposed to ring Flow Director one hour before operating (note 6.10 in ERSA). I have found this to be a complete waste of time, however, and the flow guy usually has some difficulty figuring out why you called.
Really? Maybe you should learn how to read an ERSA then.
7.2.2 ACFT DEP BK for LDG or practice ILS at SY should contact BK Ground prior to start to ascertain any expected DLA.