VAR wasn't needed for that call but they have the cameras at Fulham, but not here. Which makes no real sense to be honest does it. Brand new stadium...

Bright starts for the visitors in both games as Matej Vydra slides in the opening goal for Burnley - but he's clearly offside and the flag comes up.

Don Hutchison
Ex-Liverpool midfielder on BBC Radio 5 Live

That was a big chance! Good movement, the ball is right into his path but Ayoze Perez should be hitting the target - he pulled it badly wide

Cengiz Under is in a hurry - he gets in on goal again down that right after a lovely diagonal ball picks him out but this time his shot is pushed out by Luke Daniels.

Leicester off to a stormer.

The pitch is still a bit crunchy underfoot but Leicester make a fine start, flying machine Cengiz Under gets away down the right and cuts it back, Ayoze Perez sidefoots in a shot that fizzes wide of the far post.

Good effort.

Ditto.

Yellow ball, is rolling.

And the players are out at Brentford now as well. Looking forward to ticking off that new stadium when we can, though obviously it won't be as good as Griffin Park.

Lovely stuff.

Here come Burnley out at Fulham - does Sean Dyche fancy a good cup run this year?

Phil Russell: The magic of the FA Cup 4th round. 10 games in and only one won by the team in the lower league position.

Here's how Timo Werner missed out on a goal bonus.

One departure from London town has gone through in the last hour or so.

A weird ending to a reasonably memorable Premier League spell for Mesut Ozil. One big wage off the books.

The winners of this one take on Brighton, by the way.

The new stand at Fulham is coming on nicely, we've all seen enough episodes of Grand Designs to know that building on the riverside can't be easy. Access issues galore.

Hopefully some actual real life people will be allowed to sit in it by the time it's done.

The winners of this one face Bournemouth or Crawley in round five. Opening up?

And we've even got blue lines (don't do it) at Fulham. Though there's no snow at all on the Cottage surface.

Image source, Getty Images

Mark Burt: Luton Town have played their hearts out. A win for CFC. A hat trick for Tammy. And snow on the ground. Happy days.

A light smattering of snow still covers the middle third of the pitch in west London but the surface is perfectly fine and there's no snow falling. Both sides are much changed but we should still have a good tie on our hands.

Image source, Getty Images

Afternoon all - time to go dual screen for two more Cup crackers. We hope.

That's all from me for now. I'll be back a bit later. In the meantime, here is m'colleague Tom Rostance to guide you through the two 14:30 GMT kick-offs...

Chelsea through. And here is how it happened...