Training for physiotherapy is eligible for funding by NHS bursary and exempt from the ELQ rules. However you may have problems being eligible for an NHS bursary due to you not being resident in the UK or within the EU for immediate 3 years prior to starting a course. So you could play the long game, come back to the UK, try and secure some employment. Seek opportunities to get involved in health care with exposure to physiotheraphy even if it means volunteering. Once you have been back for at least 24 months you can start applying for courses as by the time the course starts you should have meet the residence requirement. It may be worth self funding a course which would make you eligible for physiotherapy via the postgraduate route, it would also meet the requirement for evidence of recent study at level 3 or above.
If you opt to study something that is not exempt from ELQ and is not eligible for NHS funding, your previous study means you will be unlikely to be eligible for further funding at undergraduate level. Even if you waited the 3 years to satisfy the residence requirement. There is little or no funding for post graduate study and you may not qualify as a home student if you don't satisfy the residency requirement. For postgraduate study many self fund from savings or take a career development loan.
When you return to the UK make sure you register on the electoral roll, open a bank account etc as this will all help if you need to prove residency. If you decide to delay your further education goals.