Dont wait for a reply from DVLA - which you will get sooner or later.
Contact your MP, and aquaint him/her with the facts, pointing out the DVLA rely on non registered post to send out documents/reminders etc. so you have done nothing wrong in doing the same when you sold the vehicle.
Twice in the last year I have had to cross swords with the DVLA, and only my MP prevented me from getting a £40 penalty (increased to £80 because I refused to pay the first amount).
I left a vehicle in France following a breakdown, along with documents as per French Law.
On return, I returned the tax disc for a refund of the remaining tax, along with a letter explaining the circumstances.
They sent me a SORN, which I returned, and I got my refund.
14 months later, I get a fine for not renewing the SORN.
When I point out there was no reminder, they tell me they are not legally obliged to send a reminder.
I point out that the form says that
they will remind me, and that as the car is not in this country or has a disc to remind me, I should need one.
I copied the letter to my MP and the press, and low and behold, I get a letter from the transport minister, saying their mistake - I should have had a notice of permanent export, NOT a SORN, so I dont have to pay the fine. A form will be sent in the post.
That was in November last year. I STILL have not had the form!!!
