Marizanne Kapp looks to regain some initiative with a lofted pull into the on-side. She doesn't quite middle it but the ball lands safely and they run two.

Nat Sciver-Brunt continues to vary her length, with Annerie Dercksen somehow fending a short delivery to deep square leg for a single.

I'm not sure Dercksen had much idea where the ball was going.

Alex Hartley
Former England bowler on BBC Test Match Special

Image source, Getty Images

Annerie Dercksen has looked impressive for South Africa. It's always good to find an all-rounder you can depend on and develop.

South Africa do need to look past Marizanne Kapp and think what the future will look like when she does decide to call it a day.

Just the single from Charlie Dean's latest over. England are starting to apply some scoreboard pressure.

A lot rests on Marizanne Kapp's shoulders to guide South Africa through the rest of this innings.

Annerie Dercksen did make it home, but should would have been out without that dive.

It was yet another risky single from South Africa.

Another risky single, another run out?

Annerie Dercksen goes for the full length dive to try and reach her crease before Amy Jones whips off the bails.

I think she made it home but the umpires ask for another look.

Alex Hartley
Former England bowler on BBC Test Match Special

England will really look to put the pressure on now; we always knew that the wicket of Wolvaardt would be a turning point.

There's still plenty of time left in this game and it's an excellent batting surface so this partnership will be crucial.

Rufus Bullough
CricViz analyst

England's spinners are finding just 1.7° of spin so far in their innings, which is in the lowest 10% of matches away from home for them in terms of average turn. To combat this, they are having to be incredibly accurate to remain effective. In this game 39% of deliveries bowled by the spinners would have hit the stumps - this is the third highest percentage of any match away from home for the England spinners.

Annerie Dercksen is the new batter and takes a single off her first ball from Charlie Dean.

England have carved out an opening here - can they exploit it?

Tash Farrant
England bowler on BBC Radio 5 Sports Extra

Nadine de Klerk looked really slow to get going. Marizanne Kapp didn't judge that well at all and De Klerk suffered for it.

She has looked very versatile in the past few innings and is such an adaptable player so she will be disappointed.

Is Nadine de Klerk in trouble here?

South Africa attempt a quick single with a push into the off side. Maia Bouchier throws in and Amy Jones shows tremendous athleticism to claim in front of the stumps, leap into the air and whip off the bails behind her.

De Klerk's body language suggests this is close.

Time for a bit of seam as Nat Sciver-Brunt returns for her sixth over.

She just drags one down a touch and is Marizanne Kapp is on it in a flash, heaving the ball over mid-wicket for four.

That was the only real loose delivery of the over and it was punished.

Nadine de Klerk makes the most of that reprieve with a booming shot over mid-wicket for four.

That absolutely flew to the rope.

Nadine de Klerk had just got her foot down in time.

As you were.

Amy Jones is absolutely convinced she has stumped Nadine de Klerk here.

Alice Capsey lured her forward, beat the edge and Jones was rapid behind the stumps to whip off the bails.

The decision goes upstairs.

Thanks, Sam.

My prepped opening entry was all in praise of Laura Wolvaardt, who was putting on a bit of a clinic. But as soon as I got it ready Sophie Ecclestone took her wicket. It was still a sublime innings though.

But how big a moment could that be? It was the third wicket that triggered a collapse on Sunday.

Marizanne Kapp has come out ready to play her shots.

It doesn't matter that it's Sophie Ecclestone, she's going on the attack and hits back over the England spinner's head.

One bounce for four.

The innings is beautifully poised at the halfway stage so what better time to bring in Tom Mallows?

Laura Wolvaardt has departed but the cracking cover drives keep coming.

It's Marizanne Kapp with the latest, crashing Alice Capsey away to the fence.

After the good news of the wicket, the less good - but probably expected - news is that Kate Cross will not return to the field in this innings.

She suffered a back spasm during the first over of the innings.

Sophie Ecclestone does it again for England.

Just one from the over and the huge wicket of Laura Wolvaardt, who had looked so good out there for South Africa today.

It's now over to Nadine de Klerk and Marizanne Kapp to try and ensure the innings doesn't fall away now.