In the summer Wales caretaker coach Robin McBryde said Hook's best position had not been settled, the Ospreys having used him at full-back in the past and also outside and inside centre.

BBC: Hook considered as Byrne stand-in

Hook, whose favoured position is at fly-half, has been playing regularly at centre for his region and is expected to partner Lions man-of-the-series Jamie Roberts in Wales' midfield if Byrne's appeal is successful.

BBC: Jeremy Guscott questions Welsh rugby mentality

"I think it's important for me to be playing in one position, " Hook told BBC Wales' Scrum V show.

BBC: Hook asks to be Ospreys' fly-half