If you qualify for a Student finance maintenance loan (and grant) you can still apply for it but you need to mention that your degree has changed (adding an extra year) and where you are planning to studying abroad (you should have already got an acceptance letter from the uni way before your student finance application). They will adjust your loan in accordance with the average living costs of the country, so if the living costs are higher than the UK you may get a little more than you normally would and vice versa. However this is only a rough guideline. Also just to keep in mind you cannot work legally in the country you are studying if you are on a student visa.