Accurate with the ball and showing a controlled aggression with the bat, England look a settled one-day side and, as shown with Hales coming in for Roy after he suffered a back spasm, they have good depth available to them.
The 34-year-old produced a match-winning unbeaten 181 in the fourth one-day global on Wednesday, despite having aggravated a thigh injury and suffering cramps that restricted his movement and forced him to limp singles in the successful run chase.
Chris Woakes was the pick of the England bowlers in the fifth ODI with his figures of 3/32 and he would earn the man of the series award.
Bairstow dominated the bowlers, smashing nine fours and six sixes as he thrashed a century from just 58 balls. Yet England have bucked the trend this winter, winning 4-1 in Australia as well as 3-2 in New Zealand, by bringing in highly skilled and relatively fresh 50-over cricketers to augment their Test players who excel in every format - about half and half.
Hagley Oval, Christchurch presents the flawless setting for the series finale between England and New Zealand.
"We were disappointed with how we did in the last game when we could have potentially won the series - because we got ourselves into a position [to do that]". Both sides now break from ODI cricket, New Zealand for at least seven months, so what did we learn as the final 12-month lead-in to the World Cup approaches? They have lost series deciders such as this before - Old Trafford in 2015 and Cape Town in 2016 come to mind - and given their record at global events, any sort of knockout contest is likely to fray English nerves.
They timed their partnership well, first being cautious against Moeen and Rashid to make their way to half-centuries, before accelerating.
Santner was finally snared by Woakes, though, late in the innings, the Warwickshire man also getting rid of Tim Southee thanks to a spectacular Bairstow catch on the boundary before Curran ended the innings with the scalp of Ish Sodhi. Nicholls hit Root's off-spin for six but he top-edged Tom Curran to short leg at an inopportune moment.
"The disappointing thing was too many soft dismissals through that middle order", Williamson said.
Some of his hitting straight and over mid-wicket was as clean as anybody could wish to see.
Eoin Morgan wins the toss, and sends the hosts in, New Zealand will bat first!
Not for the first time, it was the bowlers who put England in contention, restricting New Zealand to 223 all out. "I think [it was great] the way the guys went out in a game that people had compared to a knockout in the World Cup next year and said "Right, this is how we'll react".