you're not clear about what you've been looking at, there is MSc which the postgrad masters and there are also integrated masters which have names like
MSci
MBiol
MBiolsci
MBioms etc
which are basically undergraduate entry courses lasting 1 year longer than a BSc, you apply through UCAS and have your fees & maintenance paid by SFE loan. Providing you pass your exams you graduate with a masters.