Foundation year, or foundation degree? There is a difference, so watch out which one you're applying for.
The foundation year is the one where you gain the necessary skills to go onto the actual course, extending a 3 year degree up to 4 years.
The foundation degree is the first two years of a degree (FdEng qualification, I believe). You'd then do a third year to top up to an honours degree.
It sounds like you want the foundation year, just a single year. Just make sure you're on the right course.