Barry Ferguson's Rangers career moved closer to an end when the Ibrox club accepted a bid from Birmingham on Wednesday.
Ferguson, 31, will discuss terms with the Barclays Premier League club managed by his former Rangers and Scotland manager Alex McLeish.
It was reported that the bid is around £1million although that was not confirmed.
If terms are agreed, Ferguson will return to the top flight in England four-and-half years after a spell at Blackburn Rovers.
And if the midfielder leaves Rangers, he will follow Brahim Hemdani, Christian Dailly and Graeme Smith out the Ibrox door this summer.
Ferguson's Ibrox career brought plenty of success but it was latterly shrouded in controversy.
He was fined and stripped of the Rangers captaincy last season following a breach of discipline while on Scotland duty in April following a World Cup qualifying defeat by Holland in Amsterdam.
The late night drinking incident at a Loch Lomond Hotel also led to an end to his international career.
Ferguson was dropped by Rangers manager Walter Smith but returned for their last three games of the season as they won back the Clydesdale Bank Premier League from Old Firm rivals Celtic for the first time in four years.
The former Ibrox youth player was also in the Rangers side that lifted the Homecoming Scottish Cup with a 1-0 win over Falkirk at Hampden.
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