I doubt the tile is pureeee white but the grout certainly is not. We're looking at this through computer images so its hard to gauge it tho it defo is not white, i dont want it perfect but it does look grey. I guess this is why BAL relaunch there shade of white to be even whiter as its likely like the ones ive been using.
Think ill try unibond you recommended, i always thought they were a bit rubbish and frowned upon? Reviews look good apart from 1 guy on amazon say "after 6 months turned yellow and crumbly" so thats a bit worrying!