At the moment there is an early weekday EZY rotation of BFS and back twice. I think they will either chop one BFS trip and use it on the IBZ, with the weekend rotations taken from the loss of the Berlin (SXF) and GVA. (These now originate from SXF and GVA and are not operated by LPL based a/c, and spotters will have noticed the SXF/GVA are all Airbus 319s).
Otherwise the IBZ will be operated by other bases anyway as its only running July-September.