If your thinking of professional registration in the future the IET advise "If you are choosing which course to take, you are advised to seek an IET accredited qualification"
Thus if the Eastwood Park foundation degree is not accredited by the IET you'll meet the requirements of VRCT but professional registation (Engtech/IEng) will be harder than those who followed a traditional Engineering qualification instead. Thus a traditional engineering HND/degree seems a better option for those who the grandparenting critera applies but don't currently meet the educational requirements.
The Eastwood Park foundation degree seems more suitable for those who have to follow the primary critera and want to follow the approved vocational degree route.