Pete Bancroft: Makes me laugh when people say "drop Jennings, he only averages 35" and then advocate picking Stoneman who also averages 35.

Cook is beaten outside off stump by Rabada, then a couple of pigeons are dispersed as the former skipper nudges a single to mid-wicket. He has 30 from 70 balls, and Westley - no longer exclusively dealing in fours - moves to 18 from 41 with a two wide of mid-off.

Between overs, a member of the Oval groundstaff runs on with a bucket of sand - England aren't quite on fire yet, but he sprinkles some at the end of the bowler's run-ups, and to fill in some of the footmarks. (Should you really need to be doing that after only 90 minutes of play in a five-day Test?)

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

England have done what people wanted them to do, they have applied themselves. At Trent Bridge if South Africa strung three overs together something would have happened.

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England's Tammy Beaumont has arrived in the TMS box, gleefully clutching the Women's World Cup - Aggers mischievously asks Graeme Smith if he wants to hold it, to see what it's like for a South African to hold a World Cup...

Meanwhile, a Cook single is England's first run off the bat for nearly half-an-hour. Proper Test cricket, this.

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

I can't believe how deep Cook is in the crease. He has almost trodden on his stumps on a few occasions. Has he got the Gary Ballance disease?

Well, Ultra Edge has spotted an inside edge, so even before we get to the ball-tracker, the review is lost and Cook survives.

(As it happens, the ball-tracker suggests the ball was hitting leg stump, but the inside edge has saved him).

Cook is hit on the pad by Morris, it looks a bit high but they're going for the review...

Ben Thapa: Tom Westley has a compact, classical technique and times the ball beautifully. Reminds me a bit of Ian Bell in his pomp.

If Michael Vaughan felt England did not "respect" Test cricket at Trent Bridge, Cook and Westley at least are making all the right moves this morning - a TV graphic shows how consistent Cook has been at leaving anything outside off stump today. Westley plays out a maiden from Rabada.

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Jonathan Agnew
BBC cricket correspondent on TMS

Good to see after Trent Bridge, England getting their heads down and battling. Dan Norcross didn't have a single run to commentate on in his 20-minute stint.

A wild and woolly delivery from Morris down the leg side is half-parried by De Kock, leaping through the air like a goalkeeper - it probably saves four, but the batsmen can scuttle through for two byes. There's not been a run off the bat since before the drinks break.

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

South Africa have been successful overseas over the last few years. We've won the last three Test series in Australia and the last two in England - hopefully three.

Rabada continues from the Vauxhall End, Westley continues to leave well alone anything he doesn't have to play. He has 16 from 31 balls.

Image source, Reuters

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

I think it was the right decision to bat, you don't expect The Oval to go around too much. Jennings looked out of his depth technically but Cook and Westley have timed the ball beautifully. It wasn't a bad move to see if there was some grip for the spinner.

Eng 45-1published at 12:12 British Summer Time 27 July 2017

12:12 BST 27 July 2017

Cook 28, Westley 16

Geoffrey has his wish - Chris Morris is into the attack after drinks - and his first ball is a ropey wide which keeper Quinton de Kock has to take in front of first slip. In his defence, it did move off the pitch away from the left-handed Cook. There's two slips and two gullies in place - and the two gullies collide as they try to stop an edge on the bounce. Poor old Dean Elgar, he cops a painful blow in the unmentionables from Heino Kuhn's shoulder as they collide. (And you don't normally wear a box to field at gully...)

Stew Fuller: From a scoring perspective I wonder if Westley will be similar to Trott, with Trott being our best number three for a while.

Lest we forget, Jonathan Trott made his Test debut at The Oval. Mind you, so did Simon Kerrigan...