While the Blues have yet to add to their ranks so far in this window, the same can’t be said for some of those with promotion pack, with the likes of Hull, Sunderland and Fleetwood all dipping into the transfer market to boost their ambitions.
Hull have, however, seen two players also depart.
But their losses won’t be felt as hard as one endured at Doncaster Rovers.
The promotion-pushers saw highly-rated captain Ben Whiteman depart for Preston on Thursday, which will represents a huge blow to their Championship hopes.
A sizeable but undisclosed fee was obtained for the midfielder’s services, though, which means Donny boss Darren Moore will be keen to reinvest the money very soon.
Here's a look at what business was carried out by League One clubs over the past seven days...

9. Gavin Whyte: Cardiff to Hull
The winger has joined Hull on loan for the remainder of the season. The Northern Ireland international has played only seven games for the Bluebirds this term. Picture: Alex Davidson/Getty Images Photo: Alex Davidson

10. Callum Slattery: Southampton to Gillingham
The Southampton midfielder has joined the Gillson loan until the end of the season. The 21-year-old has made five senior appearances for Saints. Picture: Alessandro Sabattini/Getty Images Photo: Alessandro Sabattini

11. Mickel Miller: Rotherham to Northampton
The 25-year-old forward has joined the Cobblers on loan for the rest of the season. He has made nine Championship appearances for the Millers this term. Picture: Jan Kruger/Getty Images Photo: Jan Kruger

12. Adam Lewis: Liverpool to Plymouth
The 21-year-old wing-back has joined the Pilgrims on loan until the end of the season after spending the first half of the campaign on loan at French second-tier side Amiens. Picture: Gareth Copley/Getty Images Photo: Gareth Copley

