The 19-year-old spent much of the first half of the season on loan at Ipswich Town.
Walton joined Charlton Athletic in July 2006 for a fee of £500,000, although this could rise to £1m.
The 19-year-old spent much of the first half of the season on loan at Ipswich Town.
Walton joined Charlton Athletic in July 2006 for a fee of £500,000, although this could rise to £1m.
