Roy Keane is aiming to bring some stability to his defence as he searches for the right formula to take Blues up the table.

The Town boss has hinted that he may make changes to the side that started against Middlesbrough when Blues take on Nottingham Forest on Tuesday night.

He acknowledges though that it's important to find a settled side, particularly at the back.

"We are working hard on the training ground to get things right," the Town boss told the Club website.

"We are trying different systems, different players to find the right balance but there is also a thin line between making changes because we are losing games and trying to find a settled line-up.

"There may be one or two changes against Forest but certainly I want to nail down a back four and give them a run."