Lee Bowyer has already taken training at Birmingham City, Football Insider can exclusively reveal.

The 44-year-old has yet to be officially appointed by the Championship club amid speculation he will replace Aitor Karanka.

But a Birmingham source has told Football Insider that Bowyer has overseen his first session and will soon be named as Karanka’s successor.

Football Insider reported earlier today he was set to quit as Charlton manager and take over at St. Andrew’s.

Karanka left the club following their 3-0 defeat to Bristol City at the weekend that left them starting at the real possibility of relegation.

The Blues have won just one of their last five Championship games and are now three points above the drop zone.

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Rotherham United, who occupy the final relegation place, have three games in hand over Birmingham City.

Bowyer had spent over three years in charge of Charlton before his resignation earlier today.

In his first full season, he guided the Addicks to the second-tier before they were relegated last season despite their strong start.

They are in serious contention of an immediate return with a 1-1 draw with Shrewsbury Town on Saturday leaving them two points behind the play-off places.

Birmingham City

The 44-year-old spent two-and-a-half years as a player at Birmingham and was part of the side that won the League Cup in 2010/11.

In total, he made over 90 appearances for the Midlands outfit and helped them achieve promotion from the Championship in his first season.

In other news, Chelsea are set to explore a sensational Erling Haaland part-exchange deal.