The four Welsh regions have been put on red alert after new Wales tighthead Henry Thomas announced he will be leaving French champions Montpellier.
Former England star Thomas was a shock inclusion in Warren Gatland's World Cup training squad having impressed in the Top 14.
But upon hearing of Wales' interest in him Montpellier director of rugby Philippe Saint-André told the 31-year-old his contract would not be renewed if he accepted Gatland's offer.