Is there anything the Windies can do here? Maybe some sort of heavy machinery could dig Bairstow out. Alzarri Joseph produces a pretty spicy in-swinging yorker, but Root still has the skill to guide it behind point for a single. The floodlights are really taking effect, dusk has arrived in Southampton. I still can't believe we're playing cricket when it is October in two days.

Rovman Powell, part-time medium-pace, is into the attack, just about ticking over the 70mph mark. Both Root and Bairstow are targeting the one side, Bairstow with a shimmy across the stumps, Root with a straight bat. There's not a great deal of atmos in Southampton - the crowd sense that this one is done.

Phil Tufnell
Ex-England spinner on BBC Test Match Special

A little bit of dew might come down and it can seam under lights, but it's a good track and you can't see England messing this one up.

Alzarri Joseph, only 20, is bowling with some decent heat - 85mph. He's tall - tall enough for the bottom of his trousers to be flapping around his shins in his delivery stride. Joe Root is keen to get on the front foot, but fails to pierce the inner ring. No matter. England have got plenty of time.

Rob Davidson: Amidst the off-the-field distractions Jason Roy can take a bow for coming back in style.

West Indies look like they want to be on the plane. An attempted Cummins slower ball bounces down the leg side, away from keeper Shai Hope for five wides. When Cummins gets it straight, there's an appeal for leg before against Root, but an inside edge could well have saved the Test skipper. Hello, what's happened here? The umpire calls over after five balls, so the players go round. At the last moment, word comes from the scorers, so we all go back to finish the set.

Thanks, Kal. Evening, wherever you are. This is looking like a stroll for England, but one I want them to drag out. You can't help but feel wistful on the final day of the cricket season, especially when the sun is still shining so brightly. Let's cling on for as long as we can. The winter will drag on...

Test captain Joe Root is in and is off the mark with two worked towards the leg side. He has no issues in getting straight into the groove, scoring four from his first three deliveries.

So West Indies have the breakthrough but the damage seems to have been done.

That's all from me for today, here's Stephan Shemilt to see you through the rest of this match.

Michael Vaughan
Ex-England captain on BBC Test Match Special

He ended up playing the drive on the walk and he was front on.

Phil Tufnell
Ex-England spinner on BBC Test Match Special

Well played, Jason Roy. He'll be disappointed, because it's always nice to get three figures. What a funny game. He hasn't had a great season, comes back in strange conditions and peels of an 86 and a 96.

Image source, Getty Images

Phil Tufnell
Ex-England spinner on BBC Test Match Special

West Indies have gone.

Jason Roy swats Ashley Nurse back down the wicket for four more to take him into the 90's. Eight from the over. Jason Mohammed needs to make a change here, one last throw of the dice. Bring back the seamers. Do something. Anything.

Jason Roy with a crafty little intentional edge down to third man for three. Bairstow then gets down low and sweeps Samuels to the square-leg boundary for four.

Wallop! What a shot from Jason Roy, who jigs down the wicket and lofts it over mid-on for a six.

Andy Zaltzman
BBC Test Match Special statistician

Bairstow's fifty came up off 48 balls, containing five fours. It is his seventh in ODIs, and his fifth in 10 innings this year.

Five singles from Ashley Nurse's over. Easy work. Aside from the West Indies review, which remained not out on umpire's call, I can't think of a chance that England have offered or a time they have come close to losing a wicket.

50 for Bairstowpublished at 18.1 overs

18.1 overs

Eng 127-0

There it is. Bairstow has scored 50 from 48 balls and five fours. A solid batsman.

Image source, AFP