I'm currently an apprentice Cardiac Physiologist (so I'm employed by a hospital, get paid and have my university degree paid for by the hospital). Cardiac physiologist jobs are extremely in demand at the minute. The PTP is the practitioner training programme and is the one I'm currently doing where I'll receive my bachelor's. I can't even begin to describe how desperate the NHS is for cardiac physiologists.
I highly recommend you try and go down the apprenticeship route as you'll get so much more experience because whenever you're not at uni you'll be working in the hospital, and you won't get any debt (they're really hard to find though, the apprenticeships). However make sure it's really the career for you. I'm doing the apprenticeship right now (I'm in final year of uni) but I don't like the job, but I decided to stick with it because I'll have earned three years of experience in the NHS and I'll get a free degree at the end of it. The STP is extremely competitive and hardcore, it makes more sense to do the PTP and then get in house training to further your career and you'll end up with the same pay as an STP.. if you've got anymore questions let me know.