Brussels Airlines
Have checked a variety of dates March -June 2019 and the vast majority of flights to/from BHX scheduled to operate on RJ85 some A319''s mainly Mondays and Fridays. According to Pprune, SSJ100 being phased out hy City jet by March 19 to be replaced by RJ85 then CRJ900 in longer term.
The RJ85 or variants of were once a very common sight at BHX in AF, LH, LX, SN, EI and JY/BE colours