Career In Perfusionist, How should I go about it?

Hi
I am currently studying in my final year in BsC Hons Biomedical Science accredited. I have been doing my research on graduate study in becoming a perfusionist. I have read a few other threads regarding how to go about furthering my decision.

Many have said that it is required to do a course with NESCOT and people said however I must become a trainee perfusionist in the NHS before being able to apply.

Knowing this I look at the course structure provided by NESCOT. Here is my problem: The structure is split to (Postgrad) PG certificate, PG Diploma, and (Masters) MsC perfusionist. I can leave at any time but the PGcert takes 1 year, PGdip takes 2 years, and the MsC takes minimum of additional 4 years.

What are the differences between the 3 postgraduate studies and what is the most beneficial/important