The foundation degree point earlier seems illogical to me. I'm pretty certain that BA would not look anything but favourably upon you acquiring such - and certainly not negatively. Sure it might demonstrate that your A-Levels (or equivalents) weren't in and of themselves good enough, but your A-Levels (or equivalents) would demonstrate that on their own anyway. In my opinion getting your foundation degree says that you realised you had a problem, and so you commited yourself to finding a solution, which is itself a good quality to demonstrate. As long as you have the minimum entry requirements (equivalent as per a NARIC letter or otherwise), I really don't see that being the reason your application is rejected.