I know this may sound stupid, but I have been told different things. To do a MSc do I need a Bsc or can I do it with my BA?
It would be much appreciated to clear this up for me.
Thanks

It depends on the subjects involved. Its up to the university you are applying to to decide if undergraduate degree (whether BA or BSc) gives you the knowledge you to do a specific masters degree.

Yep, depends totally on the subject area. I'd doubt, say that you could do a BA in History and then do an MSc in Particle Physics. But I have a friend who did a BA in Geography then an MSc in Quaternary Science. It depends just how artsy and sciency the respective course are, and how well the topics are linked.