T28Yau don't panic. I ordered my X at beggining of August and have the same information in my tesla. It's incorrect!!! I like you and many others wanted answers re delivery and was not happy with the ever changing date provided by the DS. I contacted Tesla Chiswick and spoke to the manager who arranged for the head of uk deliveries to call me today. He called as promised and after airing my grievances he assured me that my car and many others will be made at the end of the month. He also assured me we would get them before the VED changes. The next change to my tesla will be to confirm car has started production so keep an eye on mytesla in the weeks to come. So if you missed the first batch then your most likely in this next run.
This must be so frustrating for you, and I really do hope Tesla can fulfil their promise. It takes between 8-10 weeks once the car is made to get to you (extract from email received from my DS). The build (for an S anyway) only takes a few days, but I don't see how they can speed the delivery process up. Loading onto the train in Fremont, across the States to Houston, onto the ship, across the pond to Tilburg, reassembly and across to the UK. None of that can go any faster, so unless the car is actually going to be built within the next couple of weeks I don't see how he can say you will definitely have it before the end of March.
I know they were trying to work on registering cars before it gets to the UK, the last I heard on that was it might be possible if the car had arrived at Tilburg but not if it was still in transit from Houston and not on dry land. Did he elaborate as to just how he was going to make sure you have it in time?
If he said you'd definitely get the car in time I'd be pushing for an email confirming that if they miss the deadline you'll receive a discount/refund/whatever equivalent to the VED charge.