Iestyn Harris will never reveal why he refused to return to Leeds Rhinos when he quit Welsh rugby union.

"I had a great time at Leeds during the five years I was there. I loved my time there," said Harris. "But when you move on - like I did when I went to rugby union in Wales - there are reasons why you don't want to go back to your former club. A lot of those are personal reasons and I'll keep them personal."

The Rhinos claimed Harris's WRU contract meant he had to return to them but Harris insists he never had any intention of returning to the Bulls' fiercest rivals.

"When the deal was done I was aware that there was a clause. But there was never an issue with that deal. It was something that nobody could talk about because there were legal issues surrounding it, which was a bit bizarre.

"I think that is still the case, supposedly. But I was pretty sure they couldn't force me to do something I didn't want to."

Rhinos chief executive Gary Hetherington has threatened to sue Harris for breach of contract but Harris is not aware of any pending legal action against him.

"Everything that has been said is just paper-talk," he said.

And Harris described Hetherington's outspoken stance over his move to Bradford as a "shame", as the Rhinos had enjoyed five good years of service from him before pocketing a massive transfer fee from his move to rugby union.

"I think they did pretty well. On the last deal I signed with them they got great benefits on tax issues from the way it was done.

"They then picked up a transfer fee of about £850,000, which is more than they've got for any other player before, so I think they did pretty well out of me."