Originally Posted by Lee R
it isnt a mk5a, its a mk5 facelift or mk5b.
How can 'a' be a follow on?

it is
like certain house numbers or flats, there's a 1 and a 1a
also, look in fast ford when they got RS2000's on the rollers, they term them as mk5 and mk5a
personally, I call it 5b/facelift to avaoid confusion, but really it should be 5 and 5a