Any news when the GTD can be ordered in the UK ?
... the short answer is, no.
Educated guess... the order books are expected to open at the beginning of February. However, the performance models may not be available immediately. For example the GTD did not appear on the German configurator until 1 month after the facelift appeared. And I still don't see the GTI PP.
Though maybe they will have all the variations available on the UK configurator at the beginning, because all the decisions have already been made for the German site.
Then we can start speculating on delivery times.