I know it seems to vary with regard to time lapsed between leaving the regs and joining the TA, and the units..... But: Assuming an ex-reg was to join the TA say 1 or 2 years after leaving, do they get to keep their rank (eg captain, sergeant etc). If so what if there is no vacancy for that rank? Find another unit? Or is there a way of having eg 1 sergeant over establishment?