We had an earlier bid for the burly centre-half rejected by the Saints and the South Coast club’s resolve to keep the former Wolves player will be tested by the higher bid.
Richards, recruited on a free transfer by Southampton, has publicly intimated that he would welcome the chance to link up again with Glenn at the Lane.
Questioned on Richards after the narrow defeat to Chelsea, which saw Goran Bunjevcevic stretchered off, Glenn commented: “There is nothing more to say about Dean, we have put a bid in and we’ll see how it evolves.
“The bid is for £7.5m.”
Glenn has revealed that the club have increased their offer for central defensive target Dean Richards of his former club Southampton.