Former Coventry City loanee Jonnie Jackson has joined Charlton Athletic on a months' loan.
The midfielder had been at Notts County after leaving Colchester United back in August.
As well as playing for City on loan, Jackson made 20 Premier League appearances with Tottenham before being released in 2006.
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Former Coventry City youngster Greg Abbott has signed a one year extension to his managerial contract at Carlisle United.
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