Eng 321-6published at 89.3 overs
That wicket ends a very, very good 173-run stand between Stokes and Foakes.
Still, an hour of Broad's interpretative dance style of batting could be equally entertaining.
Elgar & Erwee survive 9 overs
England 415-9 dec - lead of 264
Foakes 113*, Stokes 103, Bairstow 49
Stokes & Foakes add 173 for 6th wkt
Nortje 3-82, Maharaj 2-78
Second Test, day two, Old Trafford
Today at the Test, BBC Two, 19:00 BST
Sam Drury, Timothy Abraham and Amy Lofthouse
That wicket ends a very, very good 173-run stand between Stokes and Foakes.
Still, an hour of Broad's interpretative dance style of batting could be equally entertaining.
Steven Finn
Former England bowler on BBC Test Match Special
Stokes opened up so he could have a big slog but the extra bounce of that new ball just takes the top edge. We thought for a second that Elgar might have misjudged it but he took it with his fingers pointed up towards the clouds.
I am delighted to inform you that the Nighthawk has arrived.
Enter Stuart Broad.
Simon Mann
BBC Test Match Special
Stokes went for the big shot but he did not time it. Such a valuable innings that has put England into a powerful position in this match.
Stokes c Elgar b Rabada 103 (Eng 320-6)
Ben Stokes' innings is over!
He looks to go big, swinging hard at Kagiso Rabada, but the England captain ends up lobbing the ball high into the air. A backpedalling Dean Elgar takes a very well-judged catch and then heads straight over to congratulate Stokes along with the rest of his team-mates.
Some knock.
Ben Stokes has just been hit in, erm a very unpleasant area by Kagiso Rabada.
In fact, he's inside edged the ball onto his... let's say inner thigh.
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Simon Mann
BBC Test Match Special
Oh dear. Jansen put the long barrier down and somehow it went between his legs.
Lead by 169
Simon Harmer, newish ball nestled in his hand, continues, and watches a flick from Ben Foakes trickle underneath sub fielder Kyle Jansen's legs and away for a single.
Not great, that.
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#bbccricket
Steve L: Well batted, skip.
Pete Hotchkiss: Stokes. That's it. That's the tweet.
Lead by 166
Ben Stokes gently leans on his bat at the non-striker's end and watch as Ben Foakes angles his bat and tickles the first post-tea boundary.
Simon Mann
BBC Test Match Special
Stokes finally raises his bat and gets a hug from Foakes. It's been a really fine innings, controlled, authoritative and he's led his side into a very strong position.
Steven Finn
Former England bowler on BBC Test Match Special
That was the celebration of a man who's not done yet.
There it is!
A powerfully driven single cannons of Kagiso Rabada's boot in his follow through, and it gives Ben Stokes long enough to run through and wrap up an unbelievably good hundred.
It's an understated celebration from the England skipper, but he's getting a rapturous ovation from the Old Trafford crowd.
Steven Finn
Former England bowler on BBC Test Match Special
Ben Stokes in that hour before tea just exploded and has left South Africa chasing their tail.
It'll be Kagiso Rabada to bowl to Ben Stokes on 99.
Dot, dot, dot to end the over.
That'll keep Ben Stokes on strike to stat the next one.
Back into his crease goes Stokes, and a clipped single off the legs takes him to 99.
Dean Elgar runs over for a chat with Simon Harmer and keep Ben Stokes waiting for a bit longer...