Kapp dropped on noughtpublished at 31.3 overs

31.3 overs

SA 125-3

Nearly two in two! Marizanne Kapp bunts her first ball back to the bowler, Knight gets her hands to it and she can't hold on.

Ebony Rainford-Brent
Ex-England batter on BBC Test Match Special

I don't think Heather Knight has bowled herself enough in this tournament. England needed that breakthrough. These two were hanging around too long for my liking.

Image source, Reuters

I'm never entirely sure what to make of "score predictors", but the one on screen suggests South Africa could be looking at a score in the region of 243 if they continue at this rate. (I suspect they may have just followed the "double the score at 30 overs" maxim, and added another one so it looks like a computer's done it).

Another tight over from Shrubsole, just three overs from it, but this has been a largely chanceless batting display from South Africa.

Alison Mitchell
BBC Test Match Special

There's a buzz about the ground but also a tension that this third-wicket stand is looking dangerous.

Here's a fluent cut shot from Mignon du Preez, which brought her four against Anya Shrubsole:

After seven overs from Hartley, England turn back to Natalie Sciver's medium pace, and Wolvaardt blasts a couple of fours back past the bowler. All along the ground, mind you, having given Hartley that caught-and-bowled chance earlier. The batters grab an illicit drink from the 12th man between overs.

Six bowlers used by England today, Alison Mitchell on TMS wonders if the captain will have a bowl? Off-spinner Heather Knight has been a more than useful partnership-breaker in the past - indeed, she was the second highest wicket-taker in the whole of the ICC Women's Championship which preceded this tournament.

However, it's still Shrubsole for her sixth over, keeping it full and straight and yielding just two singles. The Proteas have reached Nelson - 111 - and I can imagine the old umpire David Shepherd, who played on this ground for Gloucestershire for so many years, looking down with pride as he hops from foot to foot.

Image source, Getty Images

Charlotte Edwards
Ex-England captain on BBC Test Match Special

It's an interesting position for both teams. South Africa in the last few overs have just looked to up the run rate.

Alison Mitchell
BBC Test Match Special

Laura Wolvaardt must love playing against England - she's made three half-centuries against them now.

And here is today's 50...

As Charlotte Edwards suggests, England persist with spin from the Pavilion End, but it's still Alex Hartley for now. Mignon du Preez shapes as if to play a reverse sweep to the vacant third man area, but can't connect and the ball zips into Sarah Taylor's gloves as if drawn there by a magnet. Just three singles from the over.

Charlotte Edwards
Ex-England captain on BBC Test Match Special

Du Preez likes facing spin and she's played it particularly well. I'd keep a few overs of Hartley up my sleeve. It might be England rotates the quicker bowlers from the top end and the spinners from the Pavilion End.

Image source, Getty Images

Captain Knight rotates her bowlers - and turns to the pace of Anya Shrubsole for another burst from the Ashley Down Road End, but Du Preez cuts her first ball for four. Sarah Taylor is up to the stumps, with Shrubsole tossing the odd slower ball into the mix, while Du Preez moves across the stumps well to guide a single to leg. She has 29 from 39.

Postpublished at 12:06 British Summer Time 18 July 2017

12:06 BST 18 July 2017

Natalie Germanos
BBC Test Match Special commentator

There are reserve days for both these semi-finals, but the sun's shining and hopefully we won't be using them.

Here's another boundary from Laura Wolvaardt, pulling left-arm spinner Alex Hartley back over her head for four.

Thanks, Amy - a superb opening spell from you. England could do with a wicket... Hartley spins down her sixth over, Wolvaardt brings up the fifty partnership and three figures for the team total in quick succession. Du Preez, busy at the crease, rotates the strike well.

And with that, it'll be Mark Mitchener to take you through the business end of the innings.

Charlotte Edwards
Ex-England captain on BBC Test Match Special

If South Africa are going to put a score of 250+ on the board, Laura Wolvaardt will have a crucial role to play now.

Image source, Getty Images

50 for Wolvaardtpublished at 25 overs

25 overs

SA 97-2

Laura Wolvaardt aims two big slaps down the ground off Jenny Gunn, and she can't connect with either of them. She gets third one away to the boundary, a slower delivery from Gunn, and Wolvaardt is sightly deceived by the change of pace. That tonk back beyond the bowler brings up her half-century from 81 deliveries.

Charlotte Edwards
Ex-England captain on BBC Test Match Special

I texted Heather Knight the other day and told her she'd probably saved 20 runs in the field. You never get told that as captain, particularly if you don't score any runs yourself. It's nice to get a pat on the back and be noticed.