Huddersfield with another effort through Bojan Radulovic but his header is tame and comfortably saved by Rotherham keeper Dillon Phillips following Brodie Spencer's cross.

Wrexham make the first move from the bench with Steven Fletcher replacing Ollie Palmer.

Still goalless at the John Smith's Stadium.

Mallik Wilks and Alex MacDonald have both seen efforts blocked for Rotherham, but Huddersfield are dominating possession.

The Millers are just trying to catch them on the break. Will either find the breakthrough?

Barnsley have struck early to triple their lead over Crawley Town.

Max Watters scores from close quarters to make it two and Davis Keillor-Dunn follows up with another.

The Tykes lead 3-0 while Exeter have opened the scoring in their game with Bolton through a Demetri Mitchell tap-in.

Billy Sharp is through again and poises himself to strike from close-range but is thwarted by some excellent defending from Port Vale defender Ben Heneghan who makes the challenge.

Oh dear. Could this be a route back into the game for Blackpool?

Wycombe centre-back Alex Hartridge has picked up a second booking for a late challenge outside the box and he's been given his marching orders by the ref.

The hosts will have to play the remaining 35 minutes with 10 men.

Image source, PA Media

Wycombe and Birmingham opening up a four-point gap on Wrexham as things stand.

The Welsh side have also played two games more than Blues and one more than the Chairboys.

Still a long way to go in these second halves, of course.

Did Wrexham check the half time scores and spotted that they are the only one in the top three not leading?

Maybe so as Matty James aims for an opener at the edge of the six yard box but sees it fly high.

Richard Wilford
BBC Radio WM commentator

Birmingham will be ruing the fact they haven't scored a third at the start of the second half. They have started very strongly.

Jordan Gibson puts in a cross which veteran Doncaster striker Billy Sharp gets on the end of, but his header is tipped over by Ben Amos.

Laura Kenyon
BBC Final Score reporter

Wrexham's Phil Parkinson is marking his 1,000th game in management. He joins an elite club which, of course, includes Sir Alex Ferguson.

And Fergie is here today, supporting son Darren, in freezing conditions in north Wales. He's wearing a flat cap and scarf. I don’t blame him!

No one bringing the heat on the pitch either. Wrexham, chasing automatic promotion, unrivalled home form, but struggling to find a breakthrough. Not the mismatch many thought this one might be.

Birmingham almost make it three at the start of the second half.

Blues counter quickly with Alfie May who lays it off for Willum Thor Willumsson but it's just nicked off his foot at the last moment by the back-pedalling Wigan defence.

We're getting going again for the second half in our 15 games across League One and League Two.

Ian Clarkson
Ex-Birmingham captain on BBC Radio WM

Alfie May's work-rate has been fantastic and set the standard for the rest of the team.

Birmingham haven't been brilliant, they can't just sit back in the second half.

Image source, PA Media

• Richard Kone's penalty has leaders Wycombe in front against Blackpool.
• Alfie May has scored twice for Birmingham at Wigan, giving Blues a 2-0 lead at the break.
• Wrexham v Peterborough is goalless, with Wrexham boss Phil Parkinson taking charge of his 1,000th game as a manager.
• Barnsley lead Crawley 1-0 and Mansfield are 2-1 up at Stockport, but those are the only other goals to mention in the 15:00 GMT kick-offs.
• Earlier, there were key wins for struggling duo Northampton and Bristol Rovers.

• Hakeeb Adelakun has put high-flying Salford in front at MK Dons.
• Ryan Croasdale has given Port Vale a half-time lead at fellow promotion chasers Doncaster.
• Tranmere and Accrington also lead, while Barrow v Harrogate is goalless.
• Earlier, there were wins for Bradford and Notts County in Saturday's early kick-offs.

Not many goals around in the first half of our 15:00 GMT games in League One and League Two... here are the main headlines...

Richard Wilford
BBC Radio WM commentator

A first half in which two runs forward from Ethan Laird has led to two Alfie May goals, really impressive from the pair of them.

Wigan have hit the post and looked very bright but it is Birmingham who have taken their chances and are in front.

Doncaster had the better of things with Billy Sharp and Luke Molyneux coming close to scoring but Port Vale have taken full advantage and lead at the break thanks to Ryan Croasdale's strike to score his third of the season.