England limited-overs coach Matthew Mott admitted his side must be "braver" for the T20 World Cup after being caught by surprise by the aggressive intent of India.

India cruised to a pair of comfortable victories in their first two T20I meetings with England, securing an unassailable 2-0 series lead before Sunday's final clash at Trent Bridge.

Mott revealed new England captain Jos Buttler, who replaced Eoin Morgan before the series, called on his side to be more aggressive in the outing at Nottingham with nothing to lose.

England duly delivered by posting 215-7 – their highest ever T20I score against India – as they picked up the first win since Morgan's international retirement.

A World Cup in the shortest format is to follow in Australia later in the year after T20I series against South Africa and Pakistan, and Mott implored his team to play with more freedom.

"We learned a lot of lessons in the first two games," Mott said. "India obviously came out with a really attacking mindset and put us under pressure a lot. We expected that, but the ferocity of it took us by surprise a little bit.

"After the second loss and the series loss, I thought he [Buttler] spoke exceptionally well in the group about these being the times where you learn about character.

"It's easy when you're dominating teams but we're going to learn more about ourselves playing great teams like India and South Africa leading into a World Cup – we're going to learn more about what we need in Australia when we're put under pressure.

"We talked about just being a bit braver. If anything, we could have been accused of being a bit timid with the bat. [On Sunday] we just went out there and thought, 'it's a great wicket, let's put a score out there and hang on.'

"We don't like losing but I think there is plenty that we've taken out of this series already and it sets us up well for the summer."

Ben Stokes and Jonny Bairstow, two Test stars, are expected to return to the limited-overs side and will likely slot in at number three and four respectively.

But Dawid Malan scored an important 77 off 39 balls in the third match against India, staking his claim for the number three position, while Reece Topley also impressed with the ball as he took 3-22.

Fast bowlers Mark Wood and Jofra Archer may miss the World Cup due to injuries, and Mott admitted competition for places is wide open.

"It was an unbelievable experience for some of those bowlers," he said. "Topley was magnificent and [Richard] Gleeson has been a real find for us.

"All the intel that I've had is that it's definitely been an area that we're looking to improve, so to be under that sort of pressure and hold our nerve gives us a lot of confidence.

"I don't think [the World Cup squad] is all locked in yet. This far out, you've got so many things that could happen – whether it's injuries or form, or whatever.

"We've got a fair idea of what we think the right make-up is, but you want players to come in and perform and really warrant that spot.

"It's still open for a lot of players and that's why we are having looks at different combinations and trying to learn."