Same on the 737... I joined during the last round as type rated DEP onto the 737.. 2 weeks groundschool, 5 sims plus 2 for the LPC/OPC, then line training. Around 6 weeks from joining date to final line check!
I understand each person is assessed individually, however if you are current on type the abbreviated course of 5 sims will apply.
During the last recruitment phase BA did in fact conduct a abbreviated sim/ground school course if you we're already type rated. (On the 76 anyway)
Likewise when the last entrants joined on the airbus