Full and straight from Morris first up to Broad. The ball whacks into the pads. Umpire says no. South Africa call for a review.

Graeme Swann
Ex-England spinner on BBC Test Match Special

That was a definite plan from South Africa. Faf Du Plessis put himself at short cover point just before that ball was delivered. They are over the moon with that. A great field placing.

Good from Liam Dawson. He's looking positive against the left-arm spin of Maharaj and comes down the pitch to push the ball into the off side. That forces Maharaj to change his line and the England man sweeps for four on the next ball.

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

Joe Root looked a class above everyone else. He played beautifully from the get-go. He transferred the pressure back to South Africa. He picks up length so well, he's an outstanding batter. The other batters will be in the dressing room wondering if he was batting on the same wicket. I used to feel like that when batting with Jacques Kallis and AB de Villiers.

Chris Morris has gone for 31 runs from five overs and is yet to take a wicket so it is perhaps a surprise to see him first up after tea. It looks like South Africa are going to go after Moeen as the quick bangs in a series of bouncers. For now Mo is swaying out of the way and he picks up a couple when the bowler goes for the pitched up ball after the bouncer.

Tight bowling from Maharaj. He's got two wickets already, an impressive effort on a day two pitch in these conditions. Just the one from the over.

Insult added to injury. Dawson plays a forward defensive and the ball runs through the slips for four to third man.

I still can't understand that review. I was sure there was a noise. My dad always used to tell me my wrists clicked when I played a cut shot as a kid, creating the impression I was caught behind. Maybe there was something similar with Dawson?

Graeme Swann
Ex-England spinner on BBC Test Match Special

The crowd shouldn't boo. There was a noise of some sort. He was given out in good faith and this is why we have the review system.

Crikey he's missed that by about a foot. That's bizarre. I was sure I heard a noise and bowler Chris Morris just ran through as if it was a regulation edge.

Jonathan Agnew
BBC cricket correspondent on TMS

Liam Dawson looked as innocent as a choir boy. I thought I heard a noise.

Is Dawson gone? He's been given out caught behind but has reviewed immediately.

I heard a noise.

Moeen escapes the curse of the first ball after the break by picking up a single.

That brings Liam Dawson on strike who has only faced a handful of deliveries so far.

It has been a little bit forgotten but Dawson made 66 not out against India on debut in the winter when England suffered an innings defeat. England need him to get that again here.

The players are back out.

Maharaj to bowl to Moeen. We had a wicket first ball after tea yesterday...

So Geoffrey says England are in trouble.

Here are the wickets to fall in the afternoon session.

England are rattling along at over four runs per but now they're six wickets down and still 151 runs behind.

I tend to agree. That spells trouble to me.

Right, thanks to Geoffrey Boycott for that. I'm off for a quick tea break of my my own and will leave you in the safe hands of Matt Henry.

And here is Geoffrey live on Facebook discussing this match and answering your questions.

Plenty to discuss so I'll leave you to listen to his wise words.

Some users may need to click the link above to watch the live video.

Here's the dismissal of Jonny Bairstow shortly before tea. A peach of a delivery from spinner Keshav Maharaj to remove the England wicketkeeper.