And you thought we'd finished for the day! Mark Wood (see below) has answered one of the main questions of a day when the UK put a man in space.

There'll be more insight from Mark Wood on the BBC Sport website later, but it's goodnight from me.

Remember to join us from around 07:45 GMT tomorrow for an early start. Night.

Will Barber: What single crisp could you throw the furthest? My pick is a twiglet. A quaver would be useless

MW: "Right. I’m thinking something like a cheese ball. Or a monster munch. But you’d have to throw it like a spiral, not with the hole in the middle. Technique is crucial, it’s all about the technique. A hula hoop is nice and weighty, but if you throw it wrong, the hole will disrupt you. That’s why I’m thinking monster munch, because it’s got them fingers. If you throw it down the fingers, almost like a tyre, so the middle bit goes straight."

Andrew Samson
BBC Test Match Special statistician

"After 22 Tests, Botham had 1068 runs at 36.82 and 118 wickets at 19.27. Stokes currently has 1340 runs at 34.35 and 50 wickets at 40.48."

Gareth Jones: What would players think if each session lasted 30 overs. This might hurry the fielding side up if they ended up with 20mins for lunch or no tea!

MW: "Definitely not for the lunch break. I’d be bowling backwards if I had no energy. I’m a skinny lad as it is! Good idea, but I don’t think it’s practical."

Harry Ridley: What's your favourite ground in the world?

MW: "Trent Bridge."

George Thornton: What is your idea of a perfect Sunday?

MW: "Jogging pants on, Forrero Rochers, Zulu on the telly. Bang."

Image source, Rex Features

Geoffrey Boycott
Ex-England batsman on BBC Test Match Special

"South Africa have an inexperienced attack and they struggled in the heat of the pressure of a Test match. England have a great chance to get a lead and then in the third innings sometimes people don't bat very well when under pressure."

Duncan Johnson: For young fast bowlers, what one tip/hint would you give them to help them improve and progress ?

MW: "Strengthen in the right areas, practice, practice, practice, and have plenty of fire in your belly."

Stuart Robertson: Would you rather fight an imaginary horse-sized duck or 100 imaginary duck-sized horses?

MW: "Hmm. [gives this a lot of thought]. 100 duck-sized horses. And I could control them, make them my own and build an army."

Image source, Getty Images

Geoffrey Boycott
Ex-England batsman on BBC Test Match Special

"At times England were scoring 10 an over. Stokes is a game changer. And at the opposite end, Root was playing magnificently. He's got the lot and batted beautifully."

Lydia Jane – would you rather have a pet unicorn or a pet dragon?

MW: "Dragon. Any day of the week. Especially with weather like this, to blow away the snow and that. Defrost the car, easy peasy, back in the cage."

Freddie Hatchett: Important question here, Woody: Biggie or Tupac?

MW: "Tupac. Changes is a song that gets played in the dressing room a lot, so yeah, Tupac."

Image source, Getty Images

Geoffrey Boycott
Ex-England batsman on BBC Test Match Special

"Stokes came in and counter-punched again. He's like a boxer in that you can hit him two or three times but he bounces back. He seriously gives it a clonk and he's off and running before you know it."

Ah yes... that catch from Temba Bavuma was special. He deliberately parried it into the air at short leg to ensure he had extra time to catch it. Instinct or has he been coached that?

Geoffrey Boycott
Ex-England batsman on BBC Test Match Special

"Alastair Cook may play differently next Test and get two hundreds because he's that good but he got strangled down the leg side again. Compton was doing all right but then got out to a good ball, a corker that he had to play, and was caught. Taylor got bat and pad to a lovely catch by Bavuma and England were wobbling again."

Matt Darwood: Woody - what one piece of advice would you give my 10-year-old son who plays for Northumberland U11s as he starts his career?

MW: "He's obviously already got the talent if he's from Northumberland. Have fun, enjoy it, results don't matter, but take notice of your coaches. They do actually know what they're talking about."

Matthew Slight: What's the best dressing room prank you have ever played?

MW: "In club cricket, one of my mates put a paving block into a teammate's bag. He didn't realise and carried it round for three months, thinking his bag was very heavy."

Image source, Getty Images

Just a quick note on Joe Root... his most productive shot was the on-drive. It brought him 23 runs today. I'm fairly certain that I've heard people more educated than me suggest you're in good form if you're hitting the on-drive well.

Image source, Rex Features

Geoffrey Boycott
Ex-England batsman on BBC Test Match Special

"England's batsmen didn't get off to a great start with Hales out in the same way again. He's asking for trouble in any cricket, including club cricket, unless he solves his technique, no matter how good his hand-eye coordination is or how hard he hits the ball."

Ben Sutton: So it seems earlier reports of our demise, see 10.56, have been greatly exaggerated.

England 238-5 from 52.4 overs

Batsmen: Root 110, Bairstow 4

Fall of wickets: 10-1 (Hales 1), 22-2 (Cook 18), 74-3 (Compton 26), 91-4 (Taylor 7), 202-5 (Stokes 58)

Bowling figures: Morris 13-1-62-0, Rabada 14.4-5-48-2, Morkel 14-0-63-2, Viljoen 11-0-57-1

South Africa first innings: 313 (Elgar 46, Stokes 3-53)

South Africa won toss

Full scorecard

Anyway, shall we see what Geoffrey thought about it all?