S Cook 23*, Amla 16* - dropped on 0
SA build on first-innings lead of 133
Rabada claims Test-best 7-112
Cook 76, Root 76, Moeen 61
England lead 2-0 in four-match series
Have you watched that video of Geoffrey Boycott dancing below? What is that? And what is he dancing to? Is it Cheerleader by OMI? And what would the Boycott equivalent of that be? I think I've found myself a stick of rhubarb?
Bit of cat and mouse between Rabada and Moeen. When the field comes in at the end of the over, Moeen takes four over point.
#bbccricket
Daniel Monks: Surely Moeen now deserves to be thought of as a genuine all rounder and cemented his place in the side?!
You sense that it's going to be entertaining for a little while. Moeen, with only Anderson for company, is swinging like a rusty gate at the returning off-spin of Dane Piedt. Not much bat on ball, but edges and a few byes. If Piedt's plan is to tempt Anderson with some flight, then Jimmy isn't taking the bait.
Mark Boucher
Former South Africa wicketkeeper on BBC Test Match Special
"Moeen Ali really struggled at the beginning but he came through that patch and is starting to dominate this attack.
"It just shows what can happen if you can survive those periods when you could be out every ball. It's been a fantastic innings."
Eng 330-9
Well batted, Moeen Ali. As England have fallen around him, the number eight has scored an important half-century that just about keeps them in the game. He goes there by biffing Rabada through mid-on for four. That's Moeen first Test fifty in 15 knocks.
Allow Twitter content?
This article contains content provided by Twitter. We ask for your permission before anything is loaded, as they may be using cookies and other technologies. You may want to read Twitter’s cookie policy, external and privacy policy, external before accepting. To view this content choose ‘accept and continue’.
Just looking at that South Africa lead. Already fewer than the runs England gave away with dropped catches. If you take your catches, you win matches. There really should be a saying about that. The drizzle seems to have relented.
#bbccricket
Jay: Guess I'm gonna have to be the one to ask the big one. What has cricket got to do with crickets?
Rabada, who is only 20 remember, has also posted the best figures for South Africa against England since readmission. What a future the young man has. Meanwhile, at the other end, Anderson is allowed to hammer Duminy through the covers for four. What was it about World XI at one end, Ilford Second XI at the other? If you play for Ilford, let me know if Duminy would get a bowl.
#bbccricket
Sam Jones: Don't get me started on cow corner...
Matt Lavender: As a batsman stands side on, shouldn't caught behind really mean caught at square leg, not by the wicket-keeper?
Fleming Jensen: I sort of get the reason for calling cow corner that, even if I've never seen any. However, chinaman makes absolutely NO sense.
So seven (yes, seven) for Rabada, who has pretty much carried the pace attack single-handedly, especially since Kyle Abbott hobbled off. If he gets an eighth, it will be the eighth best figures of all-time by a South Africa bowler. James Anderson is out there at number 11 and it is trying to rain again.
Mark Boucher
Former South Africa wicketkeeper on BBC Test Match Special
"South Africa will be incredibly happy with that wicket - they know Stuart Broad can bat a bit and Moeen Ali hasn't looked in danger at all.
"Fantastic bowling from the young Rabada. He has led this attack."
Broad c Cook b Rabada 5 (Eng 320-9)
Gone this time! It's not Moeen, but Stuart Broad who goes, giving Kagiso Rabada an amazing seventh wicket. Broad pulls, only gets a top edge, with a real skier held by Stephen Cook right on the square leg boundary. England on the brink.
#bbccricket
Pitchedoutsideleg: Agree with Graham re term 'all out'. If batting team are back in pavilion, surely 'all in' is fairer when one's carried his bat?
JoElle: Misleading cricket terms - "A Draw": We were getting soundly beaten, but not quickly enough.
Christian Reilly: The term "bouncer" is also misleading. Technically, unless a full toss is bowled, all deliveries bounce at least once.
Eng 320-8
Down! First ball after the break, Moeen Ali drives a full toss straight to Hashim Amla at short cover, with the ball bursting through his fellow beard's hands and to the floor. Shin high, coming quite quickly, but should have been taken.
#bbccricket
Ashley Paul: England really haven't batted that badly, save a few loose shots. South Africa have just bowled very well.
Image source, Getty ImagesThe players are back out for the evening. JP Duminy to Moeen Ali...
#bbccricket
northlondoner: Silly mid-on is actually quite a sensible fielding position.
Elliott Hutchins: The term 'over'. It's six balls. What even does that mean?!
Matt Lavender: The term wicket-keeper is misleading. After all, he doesn't keep the wickets at any point, does he?
Just to clarify, that 16:17 is the scheduled close. We can actually add an extra half hour on to that if the 38 overs aren't bowled. If it gets that late, the players might as well sleep at the ground tonight.
Want to find out about the biggest breaking news stories as they happen?
Sign up for our BBC Sport news alerts via the app and you will get a message to notify you of a breaking news story, major live sport or to share a great piece of content.
The alerts are available in the iOS, external and Android, external versions of the free, award-winning BBC Sport app - add them by heading to the menu, selecting 'My Alerts' then 'Add Alerts' followed by 'Sport News'.