As MCNB is a consecutive master`s degree, your M.A./M.Sc. is irrelevant to your application. You will apply with your B.A./B.Sc. degree. If your B.A./B.Sc. degree is not in one of the disciplines listed on our website (based on the M.Sc. Cognitive Neuroscience Access Charter), you should submit the self-disclosure form, where you will find space to list qualifications gained during your M.A./M.Sc.