I just bought a 06 Seat Leon on Saturday in a private sale, the tax is up on the car since Sept 07. Prev owner was sending off the log book today to get it changed over to my name, I'm wondering if/how long can I drive it for with no tax ? Also as it wasn't in my name I assume I won't need a form from the guards saying it was off the road and they will just renew tax from Jan ?