I did my RMT (registered massage therapist) course in a distance format. I only went to classes every few weekends for a year. I had to find an internship on my own (I did at a chiropractic clinic) and I had to study on my own.
You seem like a motivated young woman, which is important. I'm not sure how it works in the UK, but here, you can just be a massage therapist which means you took a short week-long course or something. Or you can be an RMT. I spent a year in school and when my clients come to me, I bill their health insurance company.
Obviously, the latter costs a lot more money and time. And let me just say that I COMPLETELY under-estimated the amount of course work I was getting myself into. I learned every single bone in the body, about 100 out of the 600something muscles in the body and basically how the entire body works. I learned about medications, diseases, etc.
If I could go back, I probably would have prepared myself for the extremely large amount of work there is.
Long story short, I seriously doubt there are any strictly online massage therapy courses. And if there is, please be wary of them. You NEED in-class instruction to do body work. Hopefully you can find a happy medium like a course that you can do on weekends.
HTH! =)