Thankfully the box has been replaced, no quibble.
It was siezed initially then eased slightly after a couple of days.
I was told I could be in for quite a wait while the new box arrived but came the next day. Hire car returned and GTI back on the road
I now over-shoot the selector with the very easy/smooth DSG box........lesson learn't. I've since treat my car to a super resin auto glym polish and getting some TLC