If you have lived outside the EU/ Britain for more than three years, you are no longer eligible for a bursary ... even if you lived in a commonwealth country.
Bursary Eligibility for Overseas Applicants
In order to qualify for bursary support, those applying for NHS funded courses will have to:
[font=Arial, Helvetica, sans-serif]1. Have been ordinarily resident in the UK, Channel Islands or the Isle of Man throughout the three years preceding the first day of the first academic year of the course, other than for the purpose of receiving full-time education.
[font=Arial, Helvetica, sans-serif]2. Have settled status in the UK within the meaning of the Immigration Act 1971 on the first day of the first academic year of the course.
[font=Arial, Helvetica, sans-serif]3. Be ordinarily resident in the UK on the first day of the first academic year of the courses.
Go to this web page for more information and for contact details for the agencies that handle bursaries and funding
If you want to get a diploma, you could get NHS funded education (although without a bursary), but if you want a degree any financial assistance would be means tested, and there are restrictions on access to funding for degrees for overseas applicants.
And the reason you were advised to avoid London is because the cost of living is extortionately high.