The picture changes again at the bottom - Notts County move out of the bottom four as Graham Burke nets the opener at Gillingham.

CREWE, LEYTON ORIENT AND COLCHESTER DOWN AS IT STANDS.

Word filters to Kent of Colchester's missed penalty and the Notts County fans are in fine voice. Can the Magpies find a second-half winner to stay in League One?

Jordan Spence puts the ball into his own net to give Yeovil a consolation, but it makes no difference to the positioning at the top of the League One table as things stand.

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Disaster for Colchester United in their survival bid, and hope for Preston. Goalkeeper Sam Johnstone brings down George Moncur in the box and the referee points to the spot.

But Chris Porter steps up and blazes the penalty over the bar.

The penalty is missed! Well over!

Penalty to Colchester...

A bit of a scramble in the Swindon box allows Chris Dagnall to blast in a second goal for Leyton Orient. But it doesn't change too much...

LEYTON ORIENT, NOTTS COUNTY AND COLCHESTER DOWN AS THINGS STAND.

BBC Sport's Ged Scott at Gresty Road: "A few slightly nervous expressions on faces among the locals at half-time. If this scoreline stays the same, it would still take a couple of other results to go against the Alex to send them down. But an equaliser would not only be deserved - it would be very welcome too!"

Another opportunity for Preston North End. Chris Humphrey tricks his way into the box and pulls the ball back for an unmarked Paul Gallagher on the edge of the box but his shot flies over. Gallagher looks down at the pitch after the ball appeared to bobble up.

Mathias Pogba finds the net with a header as Crawley drag themselves out of the drop zone and plant Leyton Orient straight back in it.

LEYTON ORIENT, NOTTS COUNTY AND COLCHESTER DOWN AS IT STANDS.

Preston's Jermaine Beckford races onto Daniel Johnson's perfectly timed through ball but his touch is a bit heavy which allows Tom Eastman to tackle him. Every player on the pitch knows how important the next goal will be and the nerves are evident.

We're back under way. It's a huge half for both sides. The Preston players will have surely heard what's going on at MK Dons? As for Colchester, they need to win to stand any chance of survival.

Michael Powell: MK Dons have now hit a century of goals this season. Whatever you think about the club, that is an incredible effort.

How do you see the second half panning out? Get in touch on Facebook or Twitter.

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BBC Sport's Brendon Mitchell at Ashton Gate: "Walsall have so far threatened to play the role of party poopers, with Jordy Hiwula's brace either side of goals from Aden Flint and Jay Emmanuel-Thomas leaving the Saddlers level at half-time.

"Both sides are playing a bit like there's nothing riding on the game, which there isn't, but it's been an entertaining watch."

BBC Radio 5 live sports extra's Adam Cottier has been speaking to some nervous Preston fans at half-time:

"We've been through this many, many times and we haven't got there. I'm a little bit worried but I'm hoping that we win in the second half.

"We've always known we would have to win this game. I just hope that we can put it all together and win in front of the North End fans at this end."

A late first-half goal to tell you about at Doncaster. Rob Jones has put Rovers 3-0 up against Scunthorpe on the stroke of half-time.

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Well, what a first half that was for MK Dons. Karl Robinson's men have done what they've been doing all season and fired in the goals as they currently lead Yeovil Town 4-0.

It's been much quieter in Essex where Colchester and Preston are currently goalless. A low key first-half was brought to life just before the half-time whistle with good chances at either end for Paul Huntington and Jacob Murphy.

MK DONS SECOND AS IT STANDS.

Former Bury and Burnley midfielder Jamie Hoyland on BBC Radio 5 live sports extra: "Simon Grayson's half-time talk will be really important. It's been an edgy game and it's been nervy. It's been everything we expected.

"We didn't expect to see fast-flowing, beautiful football because there is so much on the game. Colchester have been very cagey but they need a goal to keep them in the division."

The miracle escape is on for Leyton Orient, who recovered from failing to score an early penalty to go in front against 10-man Swindon.

That takes them out of the bottom four as it stands.

The only other goal at the bottom? That was at Crewe, who trail Bradford 1-0, but they will be safe unless two of the clubs currently in the bottom four secure wins today.

NOTTS COUNTY, CRAWLEY AND COLCHESTER DOWN AS IT STANDS.

The hosts have absolutely dominated proceedings, with relegated Yeovil Town looking shocked by MK Dons' dominance. Four first-half goals puts all the pressure on Preston.

MK DONS SECOND AS IT STANDS.