Year 12s: what will be the first way you research your future options? >>

Pathology/biomedical science

Can I become a pathologist from a biomedical science degree?

No, a pathologist (or rather, histopathologist, since I assume that's what you mean, rather than chemical pathology or other specialties in the area) is a medical doctor and you need to do a medical degree to become one. In which case, you should definitely not do a BMS degree as graduate entry medicine is much more competitive than standard entry medicine - if you aren't able to apply to medicine immediately, you would be best off taking a gap year (or years) to take/retake any required exams and otherwise improve your application with more work experience that you have reflected on etc.

You can work in a pathology lab following a biomedical science degree though, and this is generally what biomedical scientists in the NHS do. That said if that is your interest, your best bet is to do a Healthcare Sciences (Life Sciences) degree, rather than a biomedical sciences degree, as that will include the placements you need to register with the HCPC, which is a requirement to work as a biomedical scientist. Note that biomedical scientists do not provide clinical diagnoses based on results, they just do the testing which provides the results. Also needless to say they don't do other jobs histopathologists do like autopsies.

That said autopsies aren't the mainstay of histopathology work usually I believe, although some histopathologists do end up focusing on this work if needed in their trust, it's not a formal specialism I gather. Outside of histopathology there are other specialties in pathology, including the aforementioned chemical pathology, as well as diagnostic neuropathology and forensic pathology. Histopathologists can also subspecialise in cytopathology, and chemical pathologists can subspecialise in metabolic medicine.