Have LH increased capacity from BHX in 2013 looking at the summer schedule and its showing 3 A320's and 1 B737.
OP may have additional comments but whilst bmi ran 3 returns on this route since Summer 2011 until yesterday on behalf of LH, it operated an A320 (A319 for the first month). The fourth return operated by LH had varied equipment, so next summer looks as it was until yesterday. Winter 2012/13 looks to have reduced capacity.