Stokes has joined the party. Reverse-sweep for four before advancing down the wicket and hoicking one for another boundary. Nine off the over, a good one for England. This partnership now worth 57.

I can give you an update, the walrus mask has made its way onto the head of a cameraman. That's the loudest cheer I've heard all day.

Meanwhile, Morkel decides to double up by putting on a second jumper.

Image source, Reuters

Stephan Shemilt
BBC Sport at Old Trafford

The entertainment in party stand seems to be coming from a walrus mask. It's thrown around, whoever catches it, wears it, and gets a song. "He's got a walrus on his head." Someone accidentally threw it down the stairs and out of the stand. I fear for their safety.

Ben Stokes, inked up on his right arm, takes his guard, has a good look around and prepares to face Morne Morkel. The England batsman is tucked up by a tight line, Morkel goes a bit wider and Stokes nearly plays on.

Stokes shuffles forward and clips off his pads for a delightful four to end the over.

It's starting to look dark at Old Trafford.

I hope you're wrong, Steve. But I don't think you are, I just had a look at a rain radar and there seems to be a large shower on its way.

Well wide down the leg side from Maharaj, there's no turn and Root gets the bottom end of his bat on it for another boundary. He is scoring freely down that leg side.

The England captain is just two away from his 50.

Steve Belshaw: The rain has arrived up the road in Blackpool, can't be far away from Old Trafford

Oh hello, the crowd have livened up, lots of singing and chanting in the party stand. They were on form yesterday on fancy dress Saturday, it's been slightly more subdued today.

Root whips off his pads, chased down by Bavuma who is running across from deep square leg as England run through two.

Morkel drifts down leg, it's full and it's four as Root just steers it down to fine leg. England's lead now up to 247.

Image source, Getty Images

The players just had a drinks break, South Africa huddled together, keeping warm I imagine.

Here's something interesting, replays show that Stokes may have edged one from Morkel in that last over. There was no sound, South Africa didn't appeal. But UltraEdge shows a spike. Technology, eh?

Root momentarily becomes a left-hander to Maharaj, looking to strike the ball through the covers but it bounces up and over batsman and keeper. That looked sloppy. More bounce from the spinner, this time it outdoes everyone and goes through for four byes.

Image source, PA

Stephan Shemilt
BBC Sport at Old Trafford

Can confirm it's cold at Old Trafford. Jumper-and-jacket weather. The prize winners in the beds are all under the duvet, while those clutching cold lager do so with shaky hands. The flags are standing to attention, but the clouds stay away. For now.

Morkel to Stokes, the England batsman gets his head over the ball and drives to mid-off for a single. Root plays another fine cut shot, this time chopping the ball towards the man in the deep for one. It's a no-ball from the seamer which brings up the 100 for the hosts, free-hit? Wrong format I'm afraid.

Umpire Kumar Dharmasena has a polite word with Morkel, telling him to be careful with his follow through down the middle of the wicket.

I reminded you of Jennings' dismissal, so it's only fair I also show you how Malan lost his wicket ...

Maharaj bowls round the wicket to the right-handed Root, who is happy to pad away the first few or so deliveries, before getting down and drilling the ball to the boundary with a tremendous sweep. He had his eye on that as soon as the ball left Maharaj's hand.

England creeping up towards 100.

Image source, Getty Images

A change in the bowling as the dangerous, tall figure of Morne Morkel returns. He's bowled brilliantly in this Test and has been rewarded today with two wickets.

There's an appeal for a leg-before as the ball clips the pad and runs down fine. Going down leg, no doubt about it.

Five from the over, some decent running between the wicket between Root and Stokes. They seem to have a good understanding.

Here's another chance to see that Jennings dismissal ...

Patrick Brennan: Good news for Jennings - Malan can share the cost of the taxi fare.

I'm not sure what to make of Maharaj's pointy sideburns, as Root easily nullifies his turn by batting on the back foot. Another one keeps low but this time Root is wise to it, playing a low late cut for two.

Another single with a push to point ends the over. England will just want to keep the scoreboard ticking along, build up the lead.

Image source, Getty Images

Easy single for Root who cuts to point. I say easy, it probably isn't easy at all, but Root makes it look like it is.

Stokes dabs to mid-wicket, thinks about a quick single but then wisely sends his captain back.

Faf du Plessis is looking happier than he has done for most of this Test. This is such an important period of the game.

Just the one from the over.

Image source, Getty Images

Alison Mitchell
BBC Test Match Special

There wasn't too much Quinton De Kock could do about that delivery. It seemed to scuttle along the ground.