Postpublished at 15:40 BST 1 May 2015
Andrew Samson
BBC Test Match Special statistician
"Jonathan Trott is one of only three England openers to have got three ducks in the space of five innings: the others are Geoffrey Boycott and Dennis Amiss."
Cook hits first Test ton since May 2013
England skipper out for 105 in last over
Trott departs third ball for a duck
Venue: Kensington Oval, Bridgetown
Jamie Lillywhite and James Gheerbrant
Andrew Samson
BBC Test Match Special statistician
"Jonathan Trott is one of only three England openers to have got three ducks in the space of five innings: the others are Geoffrey Boycott and Dennis Amiss."
Luke Owen: The economy might be important I suppose, but which of the parties is going to sort out Trott and the short ball?
Alan Lloyd: Trott clearly auditioning for the one-day captain's job.
There's a shortish extra cover in for Cook against Taylor, around 15 yards from the bat. The line is by no means metronomic but when it is right, and swings in, it looks as though it will pose problems. But Cook has got the pull shot working well, quickly rocking back to hammer through wide mid-on for his second boundary.
Graeme Swann
Ex-England spinner on BBC Test Match Special
"Sometimes if you're a bowler, missing a week can knock you out of your rhythm, and Taylor hasn't started too well today. But Shannon Gabriel has been exceptional."
Conrad Marks: Trott has to be dropped, at least as an opener. His technique against genuine pace is awful. The Aussies worked him out, and now other teams are following their lead.
Wayne in Sheffield: Whatever people might say about Trott's selection, I feel sorry for him. It's not a nice way for your England career to end. But it's probably saved him a lot of heartache when the Aussies rock up.
Gabriel is even swinging the short deliveries as they pass over the batsman's head. He tries a yorker with the final ball of the sixth over but Ballance is up to it and clips it away calmly for two.
Dan in Birmingham: I don't share other people's concerns about England's opening partnership, I think Ballance has been doing a great job so far this series.
Geoffrey Boycott
Ex-England batsman on BBC Test Match Special
"I think it's going to be a tussle for a while while the ball is shiny and new. When the ball gets old it will settle down and get easier."
Taylor is getting some sharp swing into the left-handers, which is fitting as he is bowling from the Malcolm Marshall End, but with the effort ball at 90-plus mph the radar seems to malfunction a little. Ballance showing good judgement outside the off-stump, as you would expect from a man nearing 300 runs in the series.
Jonathan Agnew
BBC Test Match Special
"Gabriel bowled some quick spells in Grenada, but seemed to get out of puff a bit as the day went on. But he's got up a real head of steam here and had Cook in all sorts of trouble."
Thickset left-hander Gary Ballance is the new batsman, averaging 67 from his first 11 Tests, with four centuries and five fifties. Still three slips and a gully and he's away with a nudge for a single into the leg-side. The bustling Gabriel is bowling a useful line just outside off-stump, beating Cook with consecutive deliveries that seam away.
Geoffrey Boycott
Ex-England batsman on BBC Test Match Special
"The Australians will see these dismissals of Trott and they won't miss a trick. England don't have any imagination in selection, we don't have bad players but I think we can make our Test side even better."
Big Curtly Ambrose still looks the same as he did in the 90's and still cuts a menacing figure, who could probably unsettle many a current top order batsman, even at the age of 51. He is on the boundary rope talking to Gabriel. Cook opens England's account with a sweetly struck pull shot to the mid-wicket boundary as Taylor, from round the wicket, drops short.
Tom Holmes: Three ducks in 5 innings, one half decent score and a pitiful average, surely the Trott experiment has failed?
Simon Keeping: I like Trott but I'm afraid his time is up, just not good enough. Either open with Moeen or give Adam Lyth a chance.
Daniel Warburton: Trott has been a great player for England but he's shot for confidence and technique. How would he handle the Aussies?
Andrew Samson
BBC Test Match Special statistician
"Trott has now made three ducks in this series, all of them off three balls."
Jonathan Agnew
BBC Test Match Special
"I really think that dismissal will end this experiment of Trott opening."
Geoffrey Boycott
Ex-England batsman on BBC Test Match Special
"Trott's moving forward into it before the bowler's let it go, and then when the ball is short, you have nowhere to go, you haven't got time to get back. So he pokes at it with his hands and the ball pops off the splice. You can't play like that against high-quality fast bowling."
It was short, it rose, it was half flicked, half fended away tentatively and it looped to square-leg. Trott has gone third ball for a duck, his third of the series.
The best seats in the house for the TMS team. The broad-shouldered Shannon Gabriel, who has 28 wickets from his first 12 Tests, shares the new ball, again with three slips and a gully waiting for the edge.
Mike: Really wish people would stop being so negative about England. Winning the series at the moment. Let's hope they make it 2-0!
Jimbo: England unchanged? Same old predictable, staid lack of imagination from the coach and captain. Disappointing.