The Real Madrid ace has been heavily linked with a move to Old Trafford in recent months.

Bale, 28, put United on alert after Real’s Champions League final triumph, with the winger claiming he may quit the Bernabeu to get regular game time elsewhere.

And according to Castles, United executive vice-chairman Ed Woodward is confident he can convince the Glazers to approve a mammoth move for Bale this summer.

“Bale’s decision, if there’s a bid made, will depend on who the new coach is and whether they can convince him about his status in the team,” Castles told The Transfer Window podcast.

“Bale has resisted leaving Madrid for a long time but this summer’s different and he’s actively pursuing a move, he spoke about it after the Champions League final.