unless the dealer is going to pay the additional 2.5%??? expect to pay more if it is in the new year. I would call them and ask. I cant see many cars being delivered over xmas, from experience (used to work for VW ) it tends to be a slow time.
I have called and asked them- 8 times now. The sales guy (Drag) specifically says to me 'dont worry even if the car arrives after the new year you'll only pay the same vat free price we originally agreed on'. What else can i do? i'm worried about the situation so i call them weekly and ask about it but he gives me the same answer every time.