Due to a falling out with my Dad I'm unsure who is the registered keeper of my Mk1 Granada as it was in my name then his name and back to mine (this is the unsure bit)

I have an old style log book dated 1999 but I've not received the new style V5. Do they not bother sending them out for cars off the road for a long period?

What's the best way of finding out the registered keeper?