The uneasy truce between Super League clubs over the salary cap level is almost certain to be shattered when the RFL announce their recommendations in six months time.

"We'll certainly be back in battle again," said Bulls chairman Chris Caisley, who was unimpressed with the RFL view that the cap would be ruled legal if challenged in court.

"What they are saying is that if the salary cap is put into place in pursuit of a legitimate objective then it is legal," he said.

"But that is open to interpretation and the court may take a different view. It's their lawyer's view that it's legal - we say it's illegal."

Caisley said the RFL's proposals would almost certainly just "pay lip service" to the clubs in favour of cutting the cap.

"There are a bunch of clubs who have got together with the RFL finance director and between them they are cobbling together rules which they believe will suit themselves and balance up the competition. Well, that might suit them but it doesn't suit us.

"The truth of it is that all of these clubs are trying to fix the rules for their own purposes - to get themselves into a more competitive situation by reducing the effectiveness of those clubs at the top."

Caisley was also angered by the inclusion of Academy prospect Matthew Cook in the England under-19 rugby union squad.

"I will comment in due course but not until I have spoken to the player," he said.

"But this is the very point we are talking about with rugby union. What they are saying is that 'we don't care if he is a contracted player with the Bradford Bulls Rugby League Club - we are rugby and they can get stuffed, we are picking him'."

l Former Bulls and Great Britain full back Stuart Spruce has hung up his boots after undergoing a change of heart.

Spruce, 33, signed a new 12-month contract with Widnes last July after deciding to shelve his retirement plans but recently underwent surgery on damaged fingers and now feels it is time to call it a day.