I'm taking delivery of my new (secondhand) car tomorrow and understand that the dealer will send off the V5 so that a new V5 is issued in my name. Do I have to wait until I receive this before I can apply to transfer the private plate off my existing car to my new car?
You can only do it online / instantly if it's already in your name and the plate is in your name, you will have to wait till you get the new docs back from the dvla