Independent A-levels for summer 2018?

I'm thinking of doing independent a-levels through NEC (National Extension College), and I'm thinking of taking these three a-levels; Law, Philosophy and 'Government & Politics'. I'm hoping to finish all the required material for this and take the exams in summer 2018...realistically speaking is this possible to do or not?
If I were to simply focus on studying is this something which I could do or does it need 2 years in order to do this?

Thanks in advance

The new A Levels are a linear course, so typically you take the exam at the end of the 2 year course but I do think it's risky trying to learn 2 years worth of content in half the time and by ready for the exams. I guess it's at your own risk but all the best.

thanks for the reply it is most appreciated

but as in regards to taking 3 a levels don't some people do 6 a levels in 2 years, so if I was to do 3 in a year shouldn't that be ok? (I'm simply wondering cause I did my schooling outside the uk so I'm inexperienced in regards to knowing what the work load is going to be like)