I have to say the 1179 type thing is a bit of a mis nomer I did my Aztec rating training 27 years ago but I cannot ever remember doing a twin rating as such and the 1179 examiner who was my instructor did not hold an instructors rating. I seem to remember there was a query at the time but it was certainly not resolved by further flying training.
Oh yes should add
line training and base training are different, you need to get familiar with the type a first by base trainings, circuits etc.. can be done in the sim, if sim has JAR approval.
Line training is learning to operate the aircraft within the companies operations on line. If you were just doing a type rating you would not do line training