It's as though England are pre-programmed to bowl their spinners in tandem at this stage, I'd certainly be thinking about mixing up the bowlers a little as in this mode, South Africa are up with the rate and are on course to win comfortably. De Kock sweeps his ninth four of the innings - then immediately calls for his helmet between deliveries, as though he fears a top edge into the face.

You can follow the whole of the England women's series in SA with commentary on BBC Radio 5 live sports extra and/or the BBC Sport website.

With spin on at both ends, De Kock has now swapped his helmet for a dark green SA cap (of the ODI baseball sort, rather than the traditional baggy variety). They need 190 from 162 balls, with all 10 wickets still intact.

Geoffrey Boycott
Ex-England batsman on BBC Test Match Special

"Moeen was doing well but the batsmen get used to you. I like swapping and changing, over and round the wicket, or just one over."

50 for Hashim Amlapublished at 22.1 overs

22.1 overs

SA 127-0

Amla is halfway to becoming a Centurion centurion, not for the first time - bringing up his 29th ODI fifty from 63 balls.

Image source, Rex Features

Minas Mars: If you hit the ball with a lightsaber and only one half goes over the boundary, is it a four or a two?

Perhaps it's a question for John Holder on TMS's popular "Ask the Umpire" feature during the summer? Never mind lightsabers, what if the ball splits in two before clearing the boundary?

Another loose delivery from Moeen is despatched to the cow corner boundary, this time for four. The Proteas keeper has 73 from 70 balls, Amla has 49 from 62.

Simon Mann
BBC Test Match Special

"This is what day-night cricket is all about."

SA 122-0published at 21.3 overs

21.3 overs

The spinners have combined figures of 8-0-38-0, and the pickings are still of the easy variety as Moeen begins his fifth over... and after a single from Amla, De Kock gets down on one knee and swings him over cow corner for six into the mass of fans on the grassy bank.

Simon Mann
BBC Test Match Special

"If anyone can take a wicket out of nothing then Rashid is the man."

It feels like Amla has been in the 40s for a little while, he moves to 47 and South Africa to 111 - can 'Nelson' strike for England? Not today - De Kock nudges a single off his legs, Two more mean it's another four-run over. England were 113-1 at this stage.

Simon Mann
BBC Test Match Special

“At the moment South Africa look to be on course but there is a long way to go.”

Steady accumulation from De Kock and Amla, four chanceless singles.

And more importantly, having had 20 overs, we now have a match, even if another storm intervenes. South Africa are ahead on Duckworth/Lewis. (By about 10, we reckon).

Jon Power: I'm assuming Wicket Alerts are not working again?

James Beeching: Dear BBC Cricket please could you start sending out wicket alerts? I'd very much like Quinton to 'de Stop'.

Simon Hughes on TMS thinks Joe Root should have a bowl after his magnificent century earlier today, but for now England persist with the Moeen-Rashid combination as the natural light is nearly gone. Amla square-drives at Rashid, and Willey again distinguishes himself with another boundary stop. Just three runs from the over, but still nothing in the wickets column.

Geoffrey Boycott
Ex-England batsman on BBC Test Match Special

"We have got to hope the break helps England. Quite often it does but they have at least got to get somebody else in."

If you missed the feature on Kagiso Rabada at the interval, it's now available as a TMS podcast...

Amla brings up the century stand with a single, the ground isn't full but those who have made the journey have been rewarded with some excellent cricket today. And as the players take drinks, I'd venture that the home fans will be in a better mood than the Barmy Army, the longer this partnership goes on.

Image source, Rex

Geoffrey Boycott
Ex-England batsman on BBC Test Match Special

"I am surprised England haven’t caused them a few more problems."

Rashid begins a new over, De Kock fences it over backward point and Reece Topley belies his appearance as a gangly pace bowler by getting down superbly to flick the ball away from the boundary. I said earlier that every run counts - that can equally apply to runs saved in the field.

Image source, Rex Features