SA 200-5published at 44 overs
It's a decent comeback from Sciver after the boundary early in the over but the singles are coming easily too and take South Africa up to 200.
The tourists have really fought back well from 108-5.
England 219-5: Lamb 102, Sciver 55; De Klerk 2-44
Lamb hits maiden international ton off 91 balls; Sciver hits 55 after taking 4-59
SA 218 all out - Tryon hits 88
Multi-format currently level at 2-2 after drawn Test
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Sam Drury
It's a decent comeback from Sciver after the boundary early in the over but the singles are coming easily too and take South Africa up to 200.
The tourists have really fought back well from 108-5.
Henry Moeran
BBC Test Match Special
That is a really good shot. It was just stand and deliver and Nat Sciver barely had time to see it before it was back past her and to the boundary.
Hammered back past Sciver by Tryon. She's seeing it like a space hopper out there!
Georgia Elwiss
England all-rounder on BBC Test Match Special
It just felt like Chloe Tryon was ticking a bit there after three dot balls but then Sophie Ecclestone gave her the free toss.
Henry Moeran
BBC Test Match Special
That was not a great ball and it got the treatment that it deserved.
A pair of boundaries from Tryon from the Ecclestone over.
They both came through point, the first a full toss that was deservedly punished but the second came from some good footwork from Tryon, getting back and giving herself room to cut past the diving fielder.
Henry Moeran
BBC Test Match Special
Oh, there is a big chunk of bat!
SA 184-5
Another good review from Tryon, there was plenty of bat on that one. She bats on.
Henry Moeran
BBC Test Match Special
She has reviewed immediately. Is there a bottom edge or does she just recognise the significance of her wicket?
SA 184-6
Tryon looks to sweep Ecclestone and misses. Given but reviewed instantly again.
Phil Long
BBC Test Match Special statistician
The partnership is now up to 76. That is a record for South Africa against England for the sixth wicket, beating Helen Davies & Cindy Eksteen in Nottingham in 2000.
Sciver has replaced Cross and it is another steadier over for England, only five from it.
They will be a little disappointed that de Klerk is able to get back for two so comfortably after punching the ball into the covers but it is another over without a boundary.
Henry Moeran
BBC Test Match Special
England will be thinking 'hmmmm, how do we stem this flow of runs?'.
Tryon 68, de Klerk 21
Charlie Dean gets through the last over of her allotted 10. Four singles from it, a little respite for England but, rest assured, Tryon will be trying to get after them again before long.
Emily Windsor
Southern Vipers batter on BBC Test Match Special
Chloe Tryon has taken a liking to Kate Cross.
Alex Hartley
Former England bowler on BBC Test Match Special
That is another great shot - it is a massive six.
Six more! Last ball of the over, fuller this time from Cross, and Tryon launches it over wide long-on for her third six of the innings - and second of the over.
Tryon is doing her best to drag South Africa up to a score of note.
Phil Long
BBC Test Match Special statistician
This is now Chloe Tryon's highest score against England.
Alex Hartley
Former England bowler on BBC Test Match Special
Wow! That wasn't even a bad ball from Kate Cross.
That is what Chloe Tryon does so well - she puts pressure back on the bowlers.
Emily Windsor
Southern Vipers batter on BBC Test Match Special
That is a huge six!
Here we go... she is here to put on a show!