Scotland international defender who joined Blues on an initial two-year contract in 2013, although he is now under contract until the end of the 2016/17 season.
The 31-year old is well known to Town boss Mick McCarthy and his assistant Terry Connor, after being bought by the pair for £2.3m in 2009 whilst at Wolves.
Helped the Midlanders win promotion to the Premier League as Champions and established himself on the international scene with Scotland.
The Edinburgh-born defender, who began his career with Hearts, wears the number six shirt for Town and was named Player of the Season in his first campaign at Portman Road.
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