I hope you have better luck than I did getting an answer. I asked last year when we were looking at an '04 Discovery. I did see one (Discovery) towed once. Good luck on answers on the Defender but the LR dealer should know. I think it would be a great vehicle to tow.
Tom, Patty, Hannah "The Big Dog" and Abby Kat, Indianapolis, Indiana 2000 36' FDS 72232 Our Photos
We live out in our old van. Travel all across this land. Drive until the city lights dissolve into a country sky, me and you - hand in hand.