And so it's time to say goodbye. Can England get out of this one? Join us tomorrow to find out.

Remember, it's 08:04. Obviously.

England's Moeen Ali on Kagiso Rabada, who took 7-112 for South Africa: "He's a very good bowler for a young guy. He's a very fit guy. He's got a big future.

"If we keep them down to 270-280, we've bowled extremely well - even 300. But it's going to be really tough.

"There's still pressure on their bowlers to bowl us out on the last day, just as we've got to bowl them out tomorrow. There's still a lot to play for in this game."

It's almost time for me to get out of here, but there's still time for me to point you in the direction of our match report. The thoughts of Jonathan Agnew will be online later too.

England's Moeen Ali, who made 61 - his first fifty in 15 Test innings - on Sky Sports: "I've struggled a little bit with the bat lately so it was nice to contribute today. There was a time when I tried to play properly and I found that quite tough. Today I played a few shots - maybe on this wicket it's the right way to go.

"It's one of those wickets where you've got to ride your luck a little bit. The one that stays low are the hard ones."

Image source, Getty Images

Geoffrey Boycott
Ex-England batsman on BBC Test Match Special

"I don't think England can win from here. They haven't got a cat in hell's chance. All they can do is try to save the game. Winning is what they have to try and do but I don't think they can bowl them out cheaply."

South Africa bowler Kasigo Rabada, who took 7-112, speaking to Sky Sports: "It felt very good. I tried to take it ball by ball and things happened for me today but I thought Kyle Abbott and Morne Morkel bowled really well to help me as well, controlling the run rate. 

"I wasn't expecting to get a seven-for. Whatever else comes comes!"

Jay: All that has happened today is England have conceded a huge lead and #bbccricket, external has made it clear that the cricket needs its own dictionary

Geoffrey Boycott
Ex-England batsman on BBC Test Match Special

"England didn't deserve any more than they got. Moeen Ali did them a favour - he played very well and only gave his wicket away because he was in with Jimmy Anderson."

You should do my links more often, Matty. I'll point you in the direction of the BBC Sport live text commentary here.

Image source, Reuters

Geoffrey Boycott
Ex-England batsman on BBC Test Match Special

"It was an appalling shot from Taylor. His whole innings was fraught, trying to score, trying to dominate. He didn't think his way through. He had to play a tennis-racquet shot and couldn't control it."

Paul Roberts: If Chris Woakes is Jimmy's long term replacement the boys from Oz will be rocking peacefully in their hammocks.

Geoffrey Boycott
Ex-England batsman on BBC Test Match Special

"Kagiso Rabada bowled really well. This kid, at 20, has really got something, definitely. When you see a young player like that you can see it immediately. My only hope is that he doesn't get one of these stress fractures in the back that seems to affect so many young bowlers."

I'm actually being told that play will begin at 08:04 tomorrow, which is 10:04 local time. Once again, cricket's silliness is baffling. Why not start on the hour and finish four minutes earlier?

Geoffrey Boycott
Ex-England batsman on BBC Test Match Special

"I don't think South Africa can lose it now. They have had the best day of the whole summer against England. Everything was perfect. 

"Nothing was given to them, but they were patient and got their reward with their bowling."

Mark Boucher
Former South Africa wicketkeeper on BBC Test Match Special

"The light has been bad since the early afternoon, and we've been able to play until nearly the end of the day. Considering the weather we have had that is not bad.

"South Africa are of course on top but they're not out of danger yet though. What if England come back tomorrow and bowl them out for 80? It's not impossible..."

South Africa 42-1 (17 overs) - lead by 175

Batsmen: S Cook 23*, Amla 16*

Fall of wickets: 5-1 (Elgar 1)

Bowling figures: Anderson 5-1-14-1, Broad 4-1-8-0, Stokes 3-1-6-0, Woakes 2-0-7-0, Moeen 2-1-1-0, Root 1-0-4-0

SA first innings 475: De Kock 129*, S Cook 115, Amla 109; Stokes 4-86

England first innings 342: Cook 76, Root 76, Moeen 61; Rabada 7-112

Full scorecard

The inevitable is confirmed. That's it for the day. We'll begin again slightly earlier tomorrow, at 08:00. When we come back South Africa will effectively be 175-1.

Jonathan Agnew
BBC Test Match Special

"They're not going to get back out there now."

Mark Boucher
Former South Africa wicketkeeper on BBC Test Match Special

"When the umpires start to see four or five shadows around the players' bodies they will start to think OK, this is now false light. 

"There's one thing enhancing the sunlight, but once it becomes totally reliant on the unnatural light, the umpires take you off."