Jason Roy only played twice in Surrey's championship-winning 2018 season and managed to score a century against Essex in the final round.
The 25-year-old said that he is preparing himself well for the swinging conditions in England and is getting better and better with each passing day.
Buttler's 21-ball half-century was the fastest by an England player in this format of cricket.
Bairstow moved up four spots to No.11, Buttler went up to No.16 while Roy entered the top 20.
Buttler played a pivotal role in England's 5-0 series win and scored 275 runs in the series with three not-outs including scores of 91*, 54* and 110*.
England reached 208/9 in 48.3 overs at Old Trafford in reply to Australia's 205 all out.
Head coach Trevor Bayliss will spend the period watching the England Lions, some County Championship cricket and the One-Day Cup final on June 30.
The Tim Paine-led side's nightmare continued in the fourth ODI as they slumped to a six-wicket defeat despite Aaron Finch and Shaun Marsh's centurion knock.
England reached 314-4 in 44.4 overs in reply to 310-8 for Australia, who won the toss and chose to bat.
England put on the gigantic total of 481 on the board, surpassing their own record of the highest-ever total in one-day internationals.
England have already clinched the series 3-1 following their thumping win by 242 runs in the third ODI against Australia.
Australia's recent 242-run defeat has left the whole world shocked and the Australians fans couldn't believe what just happened in the match.
England smashed the highest-ever ODI total of 481-6 with the help of Alex Hales and Jonny Bairstow centuries.
With the mammoth total today, England surpassed their own highest ODI total of 444/3 that they scored against Pakistan at the same venue on 30 Aug 2016.
Stokes was sidelined for the first two games of the five-match series, both won by England, due to a torn left hamstring.
Roy was unruffled by two rain breaks in scoring 120 off 108 balls, and stand-in captain Jos Buttler hit an unbeaten 91 to lift England's total to 342/8, their highest ODI score against Australia.
Live Match Streaming England vs Australia 2nd ODI, Where to Watch ENG vs AUS Cricket Match Online on Sony LIV and on TV broadcast of ENG vs AUS live from Sophia Gardens, Cardiff. Get Cricket Live Score on India TV Sports.
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