Allen backing Liverpool bid for Swansea defender Williams
"Ashley is someone I know really, really well," said Allen. "He has grown enormously as a player and he is captain of the national team as well. He has done fantastic job for Swansea in that regard and he has been first class for Wales.
"He has got a lot of experience over the last few seasons at a high level. I'm sure he would be pretty comfortable if he was to play at an even higher level."