I don't think Jamie would be interested in the UK in the slightest, given his stated reasons for head back to Wee Waa. Money seemed to have nothing to do with anything - he's already turned his back on some hefty sums for 2004/5.
But if i$500K was offerred to Parra and Jamie wanted to go there, then I think he would have been released, provided Parra was compensated in full and Jamie wasn't allowed to play NRL until 2007, as per his previous contract.