Just to conclude this topic, the dealer got me my own car back, fault fixed (touch wood). It was a problem with a component in the drivers door, or at least the issue stopped when that was replaced.
It got a slight ding in the back door edge whilst it was there, but I'm hopeful a very good dent repairer can sort that.
It didn't have the software updated to version 3, but its not showing as due for my car - I can only assume it has again been pulled for cars with Rear Seat Entertainment.
Part of me wanted rid of this one with the problems, but the car tax hike and possibility of JLR wriggling out of the frequent oil changes within my 5 year service plan due to new wording on the MY18 was a concern. A circa £3000 cost over the five years I estimated.
Not had too many issues since its return. Slow boot up of media, radio deciding not to work for first ten minutes of one journey, tyre pressure monitoring system fault for a day or two. And the sat nav now seems to take an age between selecting the destination and allowing you to press "start".
Hopefully I may get version 3 of the software at some point and that may clear up a few of these other issues.
My confidence in the JLR products has taken quite a knock, but my confidence in the professionalism of this dealership is very high. So JLR may yet sell me that vogue.
As an aside, I've been advised that problems with the new dual touch screens in the vogue are quite common, certainly compared to the velar. Flickering screens, constantly tilting and retracting screens etc. Electronic systems again. Do the electronics team have some embarrassing photos of senior managers in suspenders and whipping gear or something? Its the only explanation I can think of as to why that department haven't been replaced.