Time to a command? Well, there's about 450 odd guys who are SFO/FO/CzFO in the group and they all will want a command at some stage. How many commnads per year? 40-60 maybe. Some years more than others. Some less (GFC). I would say time to command for new hires is about 8-10 years now
. Some may be luckier, depending on base transfers etc...