The first thing you need to know is that it costs nothing to apply! And, by applying at this stage, you are under NO OBLIGATION to go ahead with the course.
Applying simply reserves you at place on the course, early on.
Come August / September, you will be invited to enroll and that's when you can make your final decision whether or not to come along. And that's when you would have to pay, if you decide to join.
So, if you are at all considering any of these courses, it makes sense to APPLY NOW.
- NB - if you already have an HNC, I'm afraid it is not possible to jump in at yr3, and just 'top-up'. This is because the 'old' HNC does not match up with the 'new' HNC/D. Sorry :(