England's limited-overs coach Ashley Giles admits England are not yet the finished article despite ending their short Caribbean tour on a winning note.
The World Twenty20 starts in Bangladesh later this month and England eked out a narrow five-run win over West Indies in Barbados in their T20 match on Thursday.
Lendl Simmons (69) took West Indies close to England's 165-6 total but Jade Dernbach held his nerve as the hosts fell just short in the final over.
The result meant England avoided a whitewash in the three-match series and Giles was encouraged by the performance.
"We're not quite ready, I'd say," Giles said. "We've had one performance there with the top of the order, not a complete batting performance but I'd say that score was about par.
"But sometimes it's better to peak as you enter tournaments. We've got two warm-up games in Bangladesh, we feel we're starting to get close now and if you can get some momentum going, then who knows? If we get it right, we'll be dangerous."
Chris Jordan was named man of the match, his 3-39 adding to a frenzied 27 not out from nine balls - which included four sixes in the last over of the innings.
Captain Eoin Morgan added: "It was a fantastic game of cricket and outstanding by Chris, coming in to give Brezzy (Tim Bresnan) a bit of a rest. He showed the strength we have in the side and that's fantastic going into the World Cup."
England's all-Nottinghamshire opening pair Michael Lumb (63) and Alex Hales (38) put on 98 but the innings stalled somewhat until Jordan's late onslaught.
"The two Notts boys, Michael Lumb in particular was brilliant and set a good platform," said Morgan.
"We had a bit of a stop-start back 10 (overs) but Jords coming in at the end lifted us.
"Even with that platform, the West Indies only needed one good partnership and they got that. But the boys held their nerve right to the end really well."
West Indies captain Darren Sammy said: "It was a good game, the fans have been entertained in all three matches.
"All credit to my guys for taking it down to the final over, we still had a chance had I not put a bat on that (last ball).
"We always back ourselves to get two or three boundaries in six balls, but today Dernbach was smarter than me so credit to him."
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