Town left-back Matt Penney has joined Scottish Premiership Motherwell on loan until January.
The 24-year-old hasn’t featured for the Blues this season with Leif Davis and Greg Leigh having been signed in the summer, although was an unused sub for the Carabao Cup tie against Colchester, and his departure before next Thursday's deadline had been expected.
"We had a number of options available to us but we wanted to wait for Matt and are absolutely delighted to have him with us,” Motherwell manager Steven Hammell told his club’s official website.
"When Jake Carroll broke down in training and it was confirmed he was going to miss a significant portion of the season, and with Nathan McGinley still recovering from his operation, we knew we were going to have to bring someone in.
"Stephen O’Donnell has performed well out of position, so we now have real competition and cover on the side of the pitch.”
Penney, who joined the Blues on a two-year deal with the club having an option for a further season after leaving Sheffield Wednesday last summer, has made 21 starts and five sub appearances for Town, scoring once.
The left-back's departure means Town now have 18 players who qualify for the 22-man squad they are required to submit to the EFL following the closure of the transfer window.
That number includes all players other than those aged under-21 and goalkeepers.
Elsewhere, former Blues central defender Matt Clarke, 25, has joined Middlesbrough from Brighton, signing a three-year deal.