You dont need specific w/ex in a Pharmacy to apply for an MPharm degree.
You do need an understanding of the NHS, an idea of how to respond to patients/the public, an enthusiasm for organic and medicinal chemistry, and have thought about why you want to be a Pharmacist.
There is an orange 'sticky' thread at the top of this forum with links to lots of useful resources - NHS Values, Pharmacy role descriptions, relevant Moocs etc etc.