Rangers boss Mark Warburton has travelled south to hold talks with Aston Villa's Joleon Lescott with a view to a possible move to Glasgow.
Former Everton and Manchester City defender Lescott, 34, signed a two-year contract with Villa last year after leaving West Brom.
The Ibrox club currently have free agent and ex-Arsenal defender Philippe Senderos, 31, training with them.
And Preston North End say striker Joe Garner, 28, is free to join Rangers.
Garner was the subject of a bid from the Scottish Premiership outfit and Preston manager Simon Grayson revealed it is now up to the player whether he wishes to move.