Hi Aisling, I did my BA at CSM but I did my foundation elsewhere. Foundation was a lot of fun, but I was 18-19 and it was free for home students and all about experimenting. The first half of the year was about finding your niche, they would set us all the same task and allow us to execute how we saw fit. This would usually give the tutors an idea of what you would specialise in. The second half of the year was then about completing projects more applicable to your set area (fashion, textiles, product, fine art etc).
The idea of foundation is to help direct the path of an art & design degree after you complete it, if you don’t intend on doing a BA it might not be worth your time as it won’t give you the credentials for a job.
In terms of the ID BA at CSM I wouldn’t recommend it as it isn’t as hardcore as some of the other courses in the UK (Loughborough, Northumbria)