Can I still apply for A2 courses to get a A2 scholarship now in 2015?

What scholarships are you talking about?

In theory at least you can continue with your A-level studies, although in practice this will be quite difficult. Firstly, you will need to find a school that is happy to accept you, and one that works to the same exam board syllabus as what you did at AS. Secondly, the structure of A-level courses is changing in the UK over the next few years, starting this autumn, and you may find that the subjects that you're talking about are structured differently, which would make it almost impossible for you to continue where you left off. And thirdly, if you're not a UK resident you cannot go to a state-funded school, so you would be looking at private schools, and presumably boarding ones if you've no place to live in the UK. And finally, if you would be over the age of 19 by the time you graduate with your A-levels, you may have to go to an adult education institution as most normal secondary schools do not accept students over that age. As I said, this may be possible in theory, but will be quite difficult in practice.