Thank you - fair comment and the same conclusion that I arrived at ... eventually! Seems that you have to move from left to right with the builder, selecting colour first, then wheels, interior, options and finally, accessories. However, if you skip to, (in my case), options and then select "premium pack", you can go back to interior and get more choice.
No worries - but a wee bit confusing and misleading.
What is NOW a puzzle is that the towbar accessory no longer appears to be available to me - and it was a couple of days ago! My order has been placed but I wanted to look at the spec of the towbar - if such is available - to confirm that it would be OK for my two bike carrier and my two eBikes.
Ho humm! I have sent an Email to the salesman who dealt with my order.
Thank you for the response