The 21-year-old Scotland international will go straight into Simon Grayson's squad for Tuesday night's Championship match at Preston North End.

Grayson said: "Barry's a player we've been tracking for a while. Circumstances have now changed where Villa are in a position to let him join us and I'd like to thank them for agreeing to the move.

"He's had the opportunity to go to nearly every other team in the Championship so for him to come here makes it all the more pleasing.

"He's used to this division and he played a major part in Blackpool's run to get promoted last season, so he has experience and he fits the bill perfectly for us."

opportunities limited

Leeds have an option to extend the loan deal should they get to the Championship play-offs. However Villa will have a recall option after 28 days.

Bannan's first taste of senior football came in Villa's 2008-09 UEFA Cup campaign, when he featured against Hamburg and CSKA Moscow. But he had to wait until the opening day of the 2010/11 season before making his Barclays Premier League debut as a substitute against West Ham United.

A few days later he scored his first Villa goal against Rapid Vienna in the Europa League play-off first leg at the Gerhard Hanappi Stadium.

He was handed a brief autumn run in the first-team but has since found his senior opportunities limited by the return to fitness of Nigel Reo-Coker and Stiliyan Petrov as well as the arrival of Robert Pires and Jean II Makoun.

Bannan, who joins Villa team-mate Eric Lichaj at Elland Road, has enjoyed previous loan spells at Derby County and Blackpool, helping the Seasiders to the Barclays Premier League with a series of stand-out displays last season.