Postpublished at 14:52 Greenwich Mean Time 14 January 2016
Neil Manthorp
BBC Test Match Special
"England have nudged ahead here - they're definitely the team in ascendancy."
Morris (26*) & Rabada (20*) add 42
South Africa slip from 117-1 to 225-7
Elgar 46, Amla 40, De Villiers 36
Two wickets apiece for Stokes & Finn
Every batsman reaches double figures
England lead 1-0 in four-Test series
Marc Higginson and Stephan Shemilt
Neil Manthorp
BBC Test Match Special
"England have nudged ahead here - they're definitely the team in ascendancy."
#bbccricket
Dexter Stapster: A great game of cricket! The way the pitch is playing though... I fear the Morkel.
South Africa have lost five wickets for 95 runs. They clearly tucked into the old Collapso Soup at lunch-time. England just stuck with the leek and potato. Solid.
#bbccricket
James Levy: My phone keeps vibrating when wickets fall, leading to some annoyed stares from management. Until one asked what the score was.
Terry Mahoney: James and I have just had a look at live text. I'm his boss, it would be totally unfair if you tell him to get on with his work!
Michael Vaughan
Ex-England captain on BBC Test Match Special
"South Africa have missed a massive opportunity; they could easily have been three down today. England will be delighted - they've had the better of the day. They will be thinking, '250 all out - let's have a bat tonight'."
Don't worry, South Africa fans... Chris Morris is thew new batsman. He has a Test average of 69. Granted, he's only played one Test, but...
Michael Vaughan
Ex-England captain on BBC Test Match Special
"There's no need to take that risk. I don't know why they've gone for that single - he hit it too hard. South Africa keep getting a partnership that looks like it's going to develop."
Bavuma run out 23 (SA 212-6)
What has happened here? This is calamitous for South Africa and Temba Bavuma. Dane Vilas bangs the ball to mid-on and sets off. Bavuma isn't sure, is late to go and is miles behind in the race against sub fielder Chris Woakes' throw. Jonny Bairstow does well to dive and break the stumps in one motion, leaving Bavuma well short. In fairness, there probably wasn't a single there. Vilas got in, but he forgot about the well-being of his mate.
Geoffrey Boycott
Ex-England batsman on BBC Test Match Special
"The problem for South Africa is that four of the batsmen have got in without going on. If you're going to make really good totals, someone in the top six has to make a hundred."
Dane Vilas tries, once again, to get hold of Moeen Ali but he instead mis-cues through square leg for four.
tms@bbc.co.uk
With James Taylor at short leg and Steven Finn able to field at long leg could England have potentially the shortest legged short leg and longest legged long leg in Test cricket?
Stephen Barker
Stuart Broad is back for a bowl having spent some time off the field suffering from a stomach bug. He doesn't take any time to slip into his groove though, managing to get one to rear up off a length and hit Temba Bavuma on the gloves. Just a treble of singles in the over. 200 up.
Michael Vaughan
Ex-England captain on BBC Test Match Special
"Vilas looks like a typical keeper - busy. He's running hard and he danced to hit Moeen over his head."
Good running from Dane Vilas, who sneaks a single to mid-off.
Andrew Samson
BBC Test Match Special statistician
"One team used four official wicketkeepers in a series: India in 1952-53 against Pakistan."
Temba Bavuma would be a good name for a real ale. You'd definitely be happy with a pint of Temba if it was on tap. The early fizz in Bavuma's game has gone and he's beaten by one which keeps low from Steven Finn.
He does, however, help himself to four when Finn serves up one on his hips.
#bbccricket
Jswizzle: Remember when everyone said Finn wasn't good enough a few years ago? He's been the game changer recently.
What is it with all these Danes and Dales in South African cricket? It's like all the Mitchells in Australian cricket.
Dane Vilas comes into this game on the back of an unbeaten double century in domestic cricket. He shows his confidence by whacking Moeen Ali back over his head for four.
I've lost count of the amount of times a batsman has done this to Moeen and been sent packing two or three overs later. Moeen generally wins the fight, if not the initial skirmish.
tms@bbc.co.uk
When is the last time that none of our first five wickets in a match (or innings) came from Broad or Anderson? Looking good for the next generation!
Stuart Adnett
I see a few of you noticed my deliberate mistake before... typing Finn instead of Du Plessis. Good to see you're on the ball.
England are applying the squeeze now. They've got the door ajar, and they're primed to kick it off its hinges. Six dots from Steven Finn.