I'm 100% sure you don't need to be CRMI (i presume you mean CRM instuctor) according to JAA to do linetraining (probally some lokal UK rule if this is the case). A linetraining pilot course is a company course (which include of course CRM), since line training is flying with typerated pilots that need to learn the company 'ropes' enroute with Pax in the back.
I was reffering more to hours on type or sectors on type requirements.
PD