Town have re-signed former midfielder Darren Ambrose on a short-term deal until January. The 30-year-old had been training with the Blues in recent weeks and has twice featured for the U21s.
Ambrose, who will wear the number 29 shirt, joins John Wark, Tommy Miller, Richard Wright and Daryl Murphy as one of a select few players to have had three or more spells with the Blues.
Having come through the Town academy, he made his senior debut at Arsenal close to the end of the Blues' 2001/02 Premier League campaign.
After establishing himself in the Town side after relegation, he was sold less than a year later to Newcastle for £1 million as the club sought to raise cash having gone into administration. He had made only 25 starts and 12 sub appearances, scoring 11 goals.
Ambrose subsequently moved to Charlton before rejoining the Blues for two months on loan during the 2008/09 season but failed to win a permanent deal having made a further six starts and three sub appearances without adding to his Town goals.
A spell with Crystal Palace followed before he joined Birmingham in July 2012.
The Harlow-born player was released by the Midlanders at the end of last season following a loan spell with Greek side Apollon Smyrni.
Ambrose, who moved back to West Suffolk earlier in the summer, played for Colchester against the Blues in pre-season before joining up with the Town squad to train three weeks ago.
Meanwhile, ex-West Ham man Jack Collison has been spotted back with the Blues squad. Like Ambrose the 25-year-old has been training at Playford Road in recent weeks.
Elsewhere, Crystal Palace have reiterated that they have received no loan offers for ex-Blues loanee Jonny Williams, despite a number of Championship clubs - including Town - having registered their interest.
Photo: ITFC