In theory you can get the new colours now, and you are allowed to
use them. In practice, I've yet to see anyone supplying them --
neither the likes of B&Q nor either of the wholesalers I use have
the new colours

I have to ask for the old colours if I want them. My wholesalers (the 2 I
have accounts with) supply new colours as standard (apart from the 3 core
and earth). I

Adam