The Podiatry course is HCPC registered because on it you'll meet the requirements to register with the HCPC, through placements and other things. Which means you'll have a high chance of working in the NHS.
The biomedical science course isn't registered because it isn't a vocational degree to work as a biomedical scientist, it's a broad degree. The equivalent would be a Healthcare Science (Life sciences) degree, which is a Biomedical Scientist degree with HCPC registration, meaning you're set to work in the NHS once you graduate. However, as you've said you already have a degree. So if you don't mind which job you want to do, I would recommend the Podiatry course, due to the HCPC registration.