Du Preez dropped on 7published at 39 overs

39 overs

SA 212-4

Knight needs to quell this South African resurgence, and turns back to Anya Shrubsole who has two overs left. Du Preez hits the ball over mid-on... but Elwiss can't hang on to the catch despite getting both hands to it as the ball comes down over her shoulder. Elwiss sinks to her haunches as a team-mate retrieves the ball.

Last ball, Tryon blasts another six over square leg - that was close to going out of the ground! Tryon has 32 from 17 balls, and clearly thinks she can still win this.

Tryon lashes Ecclestone for another boundary to push the Proteas past 200.

South Africa need 130 from 72 balls. Required rate just shy of 11.

And here's how SA skipper Dane van Niekerk's inning ended:

SA 196-4published at 37 overs

37 overs

Du Preez 6, Tryon 20

Hello, where did that come from? Chloe Tryon, on seven from eight balls, leans back and smears Elwiss into the crowd at long-off. A huge six!

Last ball of the over, Tryon hoists one from outside off stump over cow corner for six more!

Clearly this game has more twists and turns to come!

Here's how Lizelle Lee departed - and with her, most of South Africa's hopes?

Ecclestone will keep bowling in the powerplay - not something all international spinners have traditionally enjoyed. (Graeme Swann great spinner that he was, hated bowling in powerplays and pretty much refused to). Just two singles apiece from the Proteas pair.

Lydia Greenway
Ex-England batter on BBC Test Match Special

South Africa have still got some big hitters to come like Marizanne Kapp.

But it takes some doing to score 10 an over for the last 15 overs.

Georgia Elwiss, restored to the side today, was not required to bat but has had a big impact with the crucial wicket of Lee, and stayed calm under that skier to remove the dangerous Van Niekerk.

Elwiss' seventh over is pretty tight, but Tryon helps herself to a four to fine leg. Time for the last drinks break of the day.

Chloe Tryon joins Mignon du Preez in the middle - as well as the wicket, just one run from that Ecclestone over, and the required rate is into double figures.

Phil Long
TMS statistician

Ten wickets have fallen today, all to catches.

Lee's replacement Mignon du Preez is off the mark.

Lydia Greenway
Ex-England batter on BBC Test Match Special

A phenomenal innings. Brilliant, clean hitting all around the ground. You can see from the celebrations of the England team that they know she was the key wicket.

Phil Long
TMS statistician

Lizelle Lee has only faced seven balls in the last five overs.

Here's how Shrubsole and Brunt combined to remove Sune Luus.

A better start for Ecclestone's second spell, just three singles from the over - suddenly South Africa's scoring rate has become pedestrian again, and the required rate has increased to more than nine an over.

Natalie Germanos
BBC Test Match Special commentator

If I'm right, the Duckworth-Lewis-Stern par score at the end of this over was 179. It's not going to rain, but South Africa are a little behind.

Anya Shrubsole, into her eighth over, shares a joke with her former Western Storm team-mate Lizelle Lee as the prolific Proteas opener jabs a quick single. Van Niekerk swipes a two to Marsh at third man.

From England's point of view, they've cut off the boundaries for now.

More wholehearted effort from Brunt - just a single apiece for each of the batsmen, and a wide affect the score.

On the "double the 30-over score" theory, South Africa would... get pretty close!