Personally I think it's unlikely that BA will take any negative inference from a foundation year.
To be honest I doubt it's much more than an initial screening. I know that my academic quaifications weren't even brought up other than when my certificates were photocopied on the very first day.
In fact, despite being successful on FPP1, I'd have been ineligible to apply for FPP2 at all due to my bare minimum qualifications and the minimum requirements changing. Go figure!