Town boss Roy Keane was back at his former club Celtic this afternoon to watch the Old Firm derby, which ended 1-1. Birmingham, Wigan and Middlesbrough also sent scouts to watch the game.
Reports in Scotland are linking the Blues with renewed interest in Celtic central defender Stephen McManus, who turned down a loan switch to Town in the summer.
However, central defence is no longer an area where the Blues are short of players with Gareth McAuley and Damien Delaney established as the first-choice pair with Alex Bruce, Tommy Smith and Pim Balkestein providing back-up. McManus was an unused sub during this afternoon's game.
The Blues have also previously been linked with Rangers midfielder or striker Lee McCulloch, who scored his side's goal today, while Celtic winger Niall McGinn, also an unused sub, was interesting Town prior to his move to Tony Mowbray's club from Derry City.
Town's January priorities appear to be a striker and a left-back, while a left midfielder may also be on Roy Keane's wish-list with Luciano Civelli still out of action with his long-term knee injury and Lee Martin having failed to settle since his move from Manchester United.
The Blues make their first signing of the transfer window tomorrow when goalkeeper Brian Murphy formalises his free Bosman switch from League of Ireland champions Bohemians.