Finally received some correspondence from them One text on Saturday confirming VIN and registration number then another one yesterday giving me my order reference and saying that it's nearly here.Ordered the same (standard white M3 LR with no options) on 16th Feb with a requested delivery date of 21st May (when my current lease is due to end).
Received email from Tesla on 1st March confirming the order but have heard nothing from them since. Emailed the DeliveryGB address last week but no response so emailed the leasing company yesterday to see if they can get an update out of them
Hopefully will get the delivery date text soon.