SA 288-6published at 85 overs
Just one run off the over. A scrambled single worked into the on side by Vernon Philander.
30 balls left for England to nip out another wicket. 30 balls for South Africa to survive.
Summary
Philander and Morris came together at 235-6
Seventh Test fifty for Philander
Amla (78) and De Kock (68) put on 113 together
Three wickets for Broad, two for Stokes
Milestones: Anderson takes 300th wicket in England & Amla brings up 8,000 Test runs
SA 288-6published at 85 overs
Postpublished at 18:19 British Summer Time 14 July 2017
Here's a clip of a cracking pull shot from Vernon Philander off Stuart Broad a few overs ago. It's all a bit more circumspect now.
Postpublished at 18:19 British Summer Time 14 July 2017
Jonathan Agnew
BBC cricket correspondent on TMSThese two have played very well. The game is nicely poised.
350 would be a par score.
SA 287-6published at 84 overs
It looks like South Africa have battened down the hatches with six overs left in the day. Just one run off Stuart Broad's 18th over as Vernon Philander works one of his pads.
SA 286-6published at 83 overs
Image source, ReutersA maiden over from James Anderson. South Africa's batsmen playing watchfully this late in the day.
Postpublished at 18:11 British Summer Time 14 July 2017
Graeme Swann
Ex-England spinner on BBC Test Match SpecialJimmy Anderson doesn't like bowling without a square leg. He is fairly stuck in his ways.
SA 286-6published at 82 overs
A bit of swing about for England's bowlers but South Africa's batsmen have negotiated the new ball pretty well so far. Stuart Broad's first over with the fresh nut includes a short ball to Vernon Philander, who emphatically belts it through midwicket for four.
That brings up the 50 partnership for Philander and Chris Morris.
SA 281-6published at 81 overs
Anderson's second delivery with the new cherry swings away and takes the edge of Philander's bat but the South African is in control of the shot as he plays it with soft hands. It falls short of Joe Root in the slip cordon.
The Lancashire seamer's final ball is a touch wider and streaks through point and to the boundary. Philander played it well.
Image source, ReutersPostpublished at 18:06 British Summer Time 14 July 2017
Jonathan Agnew
BBC cricket correspondent on TMSGet a third slip in Joe.
SA 273-6published at 80 overs
Philander 24 Morris 19
Keaton Jennings has 18 first-class wickets and it's lack of pace that is giving South Africa's batsmen something to think about.
A smirk from Jonny Bairstow as Jennings beats the outside edge. England bowling coach Ottis Gibson also affords himself a chuckle up in the stands.
Here comes the new ball... James Anderson back into the attack.
SA 273-6published at 79 overs
Vernon Philander cuts loose. Well, in relative terms. A full ball from Moeen Ali is driven down the ground for four.
A bit of a left field move by Joe Root as part-timer Keaton Jennings is brought on for the final over before the new ball is due.
Postpublished at 17:54 British Summer Time 14 July 2017
Graeme Smith
Ex-South Africa captain on BBC Test Match SpecialIt is a passage of play where everyone sitting and waiting for the new ball. England are trying to get through with as little damage as possible and South Africa the same.
SA 269-6published at 78 overs
Image source, Getty ImagesLiam Dawson gives one a bit of air and Morris swings the willow. However, he fails to make clean contact. After a slow over rate England are rattling through them now.
SA 265-6published at 77 overs
Image source, Getty ImagesBoth Vernon Philander and Chris Morris showing the maker's name again.
The physio is on to administer some eye drops to the former. A touch of hayfever perhaps, Vernon?
I feel for you - the pollen has played havoc for sensitive club cricketers all over the UK in the past few weeks.
Postpublished at 17:48 British Summer Time 14 July 2017
Graeme Smith
Ex-South Africa captain on BBC Test Match SpecialI expected these two to be a little more positive. They are just playing out to the new ball not taking any risks.
I thought they might take the opportunity to counter-attack.
SA 262-6published at 76 overs
Vernon Philander blocks out a maiden over from Liam Dawson. Both sides going through the motions a little until the new ball is offered in four overs.
Postpublished at 17:45 British Summer Time 14 July 2017
Graeme Smith
Ex-South Africa captain on BBC Test Match Special
Image source, Getty ImagesSouth Africa are just ticking it over.
You can probably start to refer to Philander as an all-rounder.
It is always important to get something from your bowlers. It is a sign of the strength of your team if your bowlers will guts it out.
SA 262-6published at 75 overs
A period of attritional cricket here. Neither Chris Morris nor Vernon Philander are looking to take on either Moeen Ali or Liam Dawson. Three singles are milked off Ali's sixth over as both players resist the big shot.
Postpublished at 17:42 British Summer Time 14 July 2017
Stephan Shemilt
BBC Sport at Trent BridgeFrom the official programme. Pretty impressive. Did anyone have Willey down as being that quick off the mark?
SA 259-6published at 74 overs
Alastair Cook dashes off the pitch for a quick break. He has to carefully usher a silver-haired lady on the steps out of the way to get the dressing room.
We've all been there in the frozen section at the supermarket trying to get to the pizzas, haven't we?
Liam Dawson has changed ends but South Africa's players are playing watchfully. Spin from both ends now.