AB De Villiers is stood at mid-off with his shirt trailing out of his trousers. It's not often you see a Test captain without their shirt tucked in. AB's pre-occupied with all things Yorkshire at the moment though - Joe Root taking a quick single which puts him within a boundary of three figures.

MG: Great game of cricket. England giving the world's top team a game in their own back yard, yet people are still critical?

Kyle Fitzpatrick: 'Root and Stokes stand revives England'.. I think this is going to be the overall strap-line of England Cricket for the next six years.

This has got absolutely nothing to do with Test cricket, but I think England have a fantastic chance of winning the World T20 with players like Joe Root, Ben Stokes in there - plus the specialists like Eoin Morgan and Jos Buttler.

Root, however, is almost toast when he is close to playing on. He deserves a century. Don't give it away, Joseph.

Stephen Giles: Taylor goes at 222 runs short of SA total and then Stokes at 111 short. Who says there's nothing in this superstition business?

Can you ever remember a lazy wicketkeeper? They're always busy, athletic sorts aren't they?

I suppose it's part of the job description. Anyway Jonny Bairstow is in the 'busy' category as he gets off the mark with a single into the leg side. I can't imagine he spends his Sunday mornings lounging on the sofa with the papers and a big plate of toast,

Image source, Gett

Neil Manthorp
BBC Test Match Special

"The storm is very close. It's quite dramatic looking out the back of this box, where it's very dark."

R+15o+t=runs.

Rooooooooooooooot.

A winning formula, eh? More runs follow when Morne Morkel pitches the ball up and it's sent back through mid-off with interest.

Andrew Morrison: Curses to all you mockers fiends with your talk of #benjo, external@benstokes38, external "just playing T20 for longer" - disaster #mockers, external

Chris:@BBCSport, external that one is on you for tempting fate!

There's plenty more batting for England, with Jonny Bairstow and Moeen Ali the next two men in. The former joins his Yorkshire team-mate in the middle and watches in awe as Kagiso Rabada is clipped behind square for four.

Michael Vaughan
Ex-England captain on BBC Test Match Special

"It's been a masterclass in how to grab control of a situation and change the course of a Test match in an hour and a half. The South African attack was looking at each other as if they were wondering who wanted to bowl."

Geoffrey Boycott
Ex-England batsman on BBC Test Match Special

"There's no shame there, he's played brilliantly."

Henry Blofeld
BBC Test Match Special

"You can almost hear the audible sigh of relief from South Africa."

JoElle: Forget Brangelina. I'll take Benjo any day.

Charles Duncan: Stokes doesn't play Test cricket, he just seems to play T20 for longer.

Geoffrey Boycott
Ex-England batsman on BBC Test Match Special

"This is a captain's worst nightmare. The ball is whistling round, the bowlers aren't making a difference, they have no control."

Ben Stokes could not be in better form here. First he punches two down the ground, then he belts four over extra cover. He then smiles to his batting partner.

Andrew Samson
BBC Test Match Special statistician

"This is the second hundred partnership between this pair. In the 12 innings that they have batted together, the run-rate is 4.56."

Jack Lennon-French: When I grow up I want to be Ben Stokes.

Zippy Hawkes: Few stokes stats - he is the highest test run scorer of 2016, by far the most 6’s & an average of 165. Is 2016 a #stokeyear, external?