When I placed the order with Lex, I got a Welcome to Tesla email to set up my account which even to this day has nothing regarding the order.
I then got some information in my Lex Portal account advising an ETA stock date of 10th March 2020, apparently Tesla gave this information to Lex.
When I heard people talking about RN numbers, I rang my Lex contact and asked them if they could share it with me, which they did. When I rang Tesla sales in Solihull they told me very little apart from they had my email address and would email me when the car arrives in Southampton.
However, ringing the delivery option instead of sales, I managed to find out I had been recently VIN matched and would be looking at a delivery date of Mid to late March which aligns with the stock date I got from Lex back in December.
Basically I'm expecting to hear nothing until the day I read an email going to both me and Lex advising the car is in the UK and arrange a date to collect it from Birmingham delivery centre.