One wicket for three runs from his four overs for Chris Morris.

Pace, aggression and so far accuracy. He was left out of the South Africa team for the first Test remember.

Another testing over for Cook to deal with. A maiden.

Graeme Swann
Ex-England spinner on BBC Test Match Special

That was a cracking first over from Maharaj, it will send shock waves and ripples through the England dressing room. He puts a lot of revs on the ball which is unusual these days. Bairstow will be in for a hell of a time.

Graeme Smith
Ex-South Africa captain on BBC Test Match Special

There is rough for Maharaj to bowl at, he bowled beautifully in the first innings. He wasn't just defensive and holding the game from one end. Du Plessis will be hoping he can do the same today. Two or three wickets from him makes the seamers life a lot easier.

Unsurprisingly after Duanne Olivier's expensive three overs, left-arm spinner Keshav Maharaj is brought into the attack.

Maharaj dismissed Bairstow with a beauty in the first innings and serves up another that pitches middle and leg before spinning and bouncing past Jonny B's edge.

That's a horrible delivery for a batsman. You just have to hope you miss it. More for these two to deal with.

Image source, Getty Images

Graeme Smith
Ex-South Africa captain on BBC Test Match Special

The England top order was an issue post Lord's. When you look at Jennings and Bairstow, and this isn't me being mean, as the opposition you will always feel you are in the game. The other option would be bringing in an all-rounder for Dawson because The Oval can be flat. But in the long-run, I think England would be better served with another batsman.

A pin has certainly been put through the balloon of optimism that was there before play.

But, for as long as Alastair Cook is batting, England fans will have a crumb of hope. Morris is bowling really quick as he tests out Bairstow with an 89mph yorker.

He found a bit of swing to go with the speed for the Root dismissal but Bairstow is able to block thanks to the lack of movement.

Graeme Smith
Ex-South Africa captain on BBC Test Match Special

South Africa will hope there is a fear factor with Bairstow and Moeen that they can prey on, which will technically make them play another way. Mentally, if you're worried about the short ball you will do things that aren't natural to you.

Alastair Cook is still fighting. He plays a lovely shot to punch four through the covers. That shows there is not too much in this pitch.

As does that! A lovely way to score your first runs. Pitched up again from Olivier and Bairstow drives from mid on with a straight bat.

Duanne Olivier has been expensive. Three overs bowled this morning and he has conceded 25 runs.

The big wicket. The dismissal of the England captain.

In all fairness there is not a lot he could have done...

David Townend: We can all talk about replacing Ballance & Jennings etc but sometimes teams just bowl well against you.

Peter Eastwood: Is Woakes back soon? Please say yes.

Chris Corfield: Why is there never talk of Morgan being given another Test chance? He's the sort of leader Root would love to lean on.

Chris Morris got plenty of slaps on the head as South Africa celebrated that wicket. Be nice lads. He's just bowled England's main man.

Morris has his tail up now. He greets Jonny Bairstow with an aggressive bouncer followed by a full ball.

Trevor Bayliss watches on silently from the balcony. Will he have anything to say to the batsmen before going out?

Image source, Getty Images

Graeme Smith
Ex-South Africa captain on BBC Test Match Special

That is what Morris will bring, not consistency but the X-Factor. Full, pace, swing, Joe Root squared up. Root is walking off slower than Inzamam-ul-Haq used to. He has got out by an excellent delivery.

Again Olivier strays in line onto Root's pads but South Africa, despite their dominant position, have a fielder on the leg side boundary keeping Root just to one.

Graeme Smith
Ex-South Africa captain on BBC Test Match Special

Cook has the ability to concentrate and bat long periods without scoring a run. I don't think Root, Bairstow or Root can bat 10, 20 minutes without hitting a boundary. Cook is comfortable in doing that.

If England are to win this how many of the runs will Alastair Cook have to score?

250? 300?

Here are four runs to get him on the way to that.

Just two slips for Morris with England still 425 runs in arrears. Make of that what you will. He has got two men out on the hook but Root isn't tempted by the bouncer.

He pushes a quick single into the off side and is able to make his ground comfortably because Temba Bavuma doesn't pick up cleanly.

Bavuma is annoyed. He's one of the tourists' best fielders.

Graeme Smith
Ex-South Africa captain on BBC Test Match Special

I find it difficult to watch Jennings, he is so stiff, so upright. His head never goes to the ball. I wonder how he even sees the ball because he's so upright. He has to work really hard.

An hour gone and England have seen the back of Morkel and Philander for now. The bad news is South Africa have taken two wickets with those two in the attack.

Chris Morris comes on after drinks.