Mumski
Our car is build week 17 and is somewhere in england on its way to the dealer hopefully.
Once the car has been built the dealer should be able to give you the chassis number, ours could! Ours has now issued the registration number, and I would guess will call towards the end of the week.
See the post below from funkdubious as its informative as to what the dealer should be able to tell you and when.
If your salesperson is uncooperative ring the number for the garage and ask to speak to the dealer principle, or the sales manager and explain clearly that you are not happy with their service and lack of information and that you need to chase them all the time. Then ask them clearly what they are going to do about it.
We were told the car could sit in Emden for 12 days and its arrival port for days as well.
http://www.upownersclub.co.uk/forum/build-week-18_topic500_post5352.html?KW=status#5352