BMI would have taken the space of VSLR and EI (although where EI would have gone is beyond me...possibly T5 to feed into BA as they wouldn't have started BHD/DUB again). T2 was designed with BMI in mind which is why it even has the domestic and Irish arrival facilities.
I am confused as to why FI are being allowed in to T2 when they are not star alliance and AI who are over in T4 will be the only non Star alliance carrier outside of T2.
VSLR will cut down by March so that allows space for FI, and then by September they will gone totally, allowing space for possible Air India to come in.