Postpublished at 15:52 British Summer Time 18 July 2017
Dan Norcross
BBC Test Match Special
At exactly this same stage, South Africa were 121-2.
England win with two balls to spare
SA 218-6: Du Preez 76*, Wolvaardt 66
Wickets for Shrubsole, Sciver, Gunn & Knight
Taylor's superb stumping removes Chetty
England play Australia or India in Lord's final
Amy Lofthouse and Mark Mitchener
Dan Norcross
BBC Test Match Special
At exactly this same stage, South Africa were 121-2.
Target 219
Left-arm seamer Moseline Daniels returns, and immediately boosts that extras tally with a wide. Captain Knight is happy to play the supporting role to Taylor, but Daniels - no more than medium pace - is more difficult to get away than Kapp. A single takes the skipper to 23.
Taylor 45, Knight 22
With Khaka bowled out, the pacy Marizanne Kapp returns - and Sarah Taylor has the crowd on their feet with an extravagant ramp over the keeper's head for four, before pulling another four through square leg to move to 45. Kapp's extra pace on the ball seems to suit Taylor down to the ground. England need 98 from 21 overs.
Looking away from the women's game for a moment, and there's some bad news for England number three Gary Ballance. He looks set to miss the next Test against South Africa with what's being reported as a broken finger.
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Target 219
Luus spins down her third over - Taylor and Knight continue to practice the sweep shot with aplomb (although not quite on the scale of another England batsman in a World Cup semi-final - for those of us who remember Graham Gooch sweeping, sweeping and sweeping against India in the 1987 semi).
Four singles from the over - and with the required rate still a smidgen below five, that'll do fine for now.
It's not been a happy day for Trisha Chetty. A finger injury and two dropped catches - although this latest one off Heather Knight was a toughie...
Khaka 10-2-28-2
Khaka to bowl her 10th and final over off the reel, having probed away well outside off stump since the ninth over. Taylor moves to 35 with a single threaded through the covers, Knight pinches the strike (she's captain, so she's entitled) and Khaka takes her cap (or in her case, a broad-brimmed green sunhat) with figures of 2-28. Well bowled.
A cover-driven four from Sarah Taylor is a wonderful sight - but she's equally ruthless when punishing ropey full tosses, as she does here from Van Niekerk:
Target 219
Thanks, Amy. No pressure, then. (I've just spotted Lauren Winfield quite literally biting her nails on the England balcony). Taylor and Knight unleash some fluent sweep shots at Luus which bring them both a single, while a loose Luus delivery (promise it's the last time I'll say that), begging to be despatched, is smeared straight to mid-wicket.
And with that, the very capable hands of Mark Mitchener will take you through the rest of England's chase.
Taylor 32, Knight 18
An utterly adorable, tiny relative of Katherine Brunt's is running around on the boundary's edge, suitably bedecked in a 'Brunt' England shirt. On the field, Ayabonga Khaka continues. Presumably she's going to bowl out here. And why not? She's only going at two runs an over.
Ebony Rainford-Brent
Ex-England batter on BBC Test Match Special
I think they may have left the seamers on for one too many overs. When you're not getting wickets, you need to chop and change. England are in control, but it's still a long way to go.
A change of bowing for South Africa - here's leggie Sune Luus. That's short and a bit of rubbish and Heather Knight smashes it away, but only along the ground in the direction of the nearest fielder. A simple jogged single brings up England's 100, and that draws a polite round of applause from the crowd. Ooft! A delivery from Luus is so slow that is pretty much bounces twice, and Knight just about avoids yorking herself!
Target 219
Sarah Taylor takes a step down the pitch and aims a big drive over Ayabonga Khaka, but the bowler gets down low to collect the ball. There's some kids beyond the boundary practicing their bowling drills, which is great to see. One lad has a decent right arm on him.
Oh, is that a drop? A thick outside edge from Heather Knight, hands flailing, and the ball sails past a diving Trisha Chetty yet again. I think she might have got a finger to that...
#bbccricket
Graham Roberts: Re: 15:06. Less of this small-minded thinking!! Winning Final and 75 for Beaumont it is.
Taylor 26, Knight 13
Dane van Niekerk doesn't around when it comes to bowling her overs. She cracks through another one and Taylor and Knight exchange singles. Five of them, to be precise. England just need to keep ticking along at four an over.
Mel Jones
Former Australia batter on BBC Test Match Special
Does Lizelle Lee play rugby? I think she just shoulder-charged that ball, trying to get her body behind it.
And I think I just saw Sune Luus warming up to bowl.
One bowler England aren't getting away is Ayabonga Khaka, who has been superbly accurate. She bowls straight into Knight's pads and the England captain has to settle for either cracking the ball up to a fielder or defending back to the bowler. A maiden. Excellent stuff.
Phil Long
TMS statistician
That was Sarah Taylor's 50th four of this World Cup. She's the first player to reach that mark.
Target 219
Van Niekerk continues, and that's lovely work from Sarah Taylor! A little shimmy down the pitch, turning a flighted ball into a full toss, and she batters the ball away to the boundary with a superb flourish. What's been good from these two is they haven't allowed van Niekerk to get into a rhythm, still managing to work the singles away.