Both teams are out in the middle and we're about to get under way, with Katherine Brunt taking the ball first for England...

Image source, WICB Media/Athelstan Bellamy

Image source, WICB Media/Athelstan Bellamy

Lauren Winfield (above) also looked in excellent nick on Sunday, also scoring a half-century alongside opening partner Tammy Beaumont before it all went badly wrong: 

A reminder of what happened: Home captain Stafanie Taylor made 85 as West Indies posted 223-6, helped by four dropped catches and a missed stumping.

The tourists were well placed at 133-1 but five run-outs and three wickets from Taylor saw England bowled out for 181 and the series levelled at 2-2.

Stephan Shemilt
BBC Test Match Special

It's a new surface, so we don't expect it to deteriorate as much as the other game has. But what we haven't mentioned is how badly the sides have chased. England could have won the second and fourth ODIs - sometimes we overplay the conditions.

Apart from the third ODI when England bowled brilliantly, there's no reason why the side batting second couldn't have chased it down. Maybe they've not had the skills or the mental toughness to get over the line. If England can do that today, not only will it be a brilliant series victory, it'll also be an important step in the development of this side under Mark Robinson and Heather Knight.

Lydia Greenway
Ex-England batter on BBC Test Match Special

From listening to Heather, I don't think England are that concerned about chasing. When the ground's dried off, the outfield will be a little quicker. Winning the toss gives you a slight advantage - if the conditions are good throughout the day it doesn't matter as much, but these pitches have deteriorated a little as the day goes on.

More from England captain Heather Knight on TMS: "We have shown we've got the skill to beat them - we've got to be a bit calmer under pressure. We had a good training session yesterday and we're ready. It's a massive game, these are the ones you train hard for."

Henry Moeran
BBC Test Match Special commentator

England could have sealed qualification for the World Cup if they had won all of the last three matches here - but instead, it's the series in Sri Lanka next month which is going to be decisive.

West Indies captain Stafanie Taylor on TMS: "It's a huge advantage to us to get the batting out of the way, put a decent target on the board and defend it. You could see in the last game England were batting well, but we held our nerve and restricted them."

Both teams are sticking with teams that played in Sunday's fourth ODI with West Indies also unchanged. 

Hayley Matthews and Shaquana Quintyne will be opening for the hosts shortly. 

Lydia Greenway
Ex-England batter on BBC Test Match Special

It looks very similar to the pitch they played on in the first two ODIs, just a little bit less grass on so there are a few more exposed patches. West Indies batted really well the other day, getting up to 220 as a result of Stafanie Taylor batting through. The toss is important, but someone from the top five still has to bat through to the end.

Our man Stephan Shemilt - about to go an air for TMS commentary on 5 live sports extra at 15:15 BST - has been helping out in the field at England practice.

Tammy Beaumont was obviously looking to hit it far - as she did in the fourth ODI on Sunday when she scored a fine 57.

The opener will have to wait to bat today though with West Indies currently padding up. 

England captain Heather Knight tells BBC Sport: "A little disappointed, but not too much. We actually considered bowling this morning as there's the potential for a bit of rain later, and the pitch is a little bit tacky - a bit of water got under the covers from yesterday.

"I was about 60% [for] batting 40% bowling, so hopefully our seamers can get the most out of this pitch, and we can chase better than we did the other day."

Well, that's definitely not what the tourists wanted but the good news is that this match is being played on a different pitch. 

Perhaps it won't be so difficult to bat second. 

Perhaps...

Image source, BBC Sport

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Image source, WICB Media/Athelstan Bellamy

Four matches, two wins each and now it's time for the decider...

England seemed well on course to clinch the one-day series against the West Indies on Sunday but somehow contrived to lose five wickets to run outs before eventually going down by 42 runs.

We're back at Sabina Park in Jamaica to see who can hold their nerve and seal the series in the fifth and final ODI.

And the first thing to remember is that all four matches have been won by the side winning the toss and batting first.

So the flick of a coin that's about to happen is especially crucial...

Image source, WICB Media/Athelstan Bellamy