Four-match series level at 1-1
Hales 109 - maiden ODI century
Root 63, Roy 54; Riaz 4-43
Pakistan bowled out in 45.5 overs
Sarfraz 64; Woakes 4-33, Willey 3-25
Left-arm paceman Wahab goes round the wicket in the manner of his compatriot, the great Wasim Akram - it almost immediately produces an appeal for a catch behind, the umpire raises his finger and Hales immediately reviews it...
With Wahab Riaz having benefited from a change of ends, now leg-spinner Yasir Shah has switched to the far end (ie not the pavilion/commentary end. It's actually called the Northern End. I wish some cricket grounds would think up more imaginative names for their ends/stands than just the compass points. Personal view).
Root and Hales take four singles from the first four balls, but Root has a little talking-to from the umpire for running down the middle of the pitch. He plunders a well-run three, before another Hales single takes the opener to 48 from 51 balls. Nelson (111) arrives...
Ramiz Raja
Former Pakistan captain
Image source, AFP"Pakistan's only chance of a comeback in the middle stage of the innings is to take wickets. Otherwise England are quite well versed in running away with the show from this position."
Joe Root joins Hales at the crease - like Roy, he was out without scoring on Wednesday. Unlike Roy, he's currently in a three-way battle with Steve Smith and AB de Villiers for the number one Test batting ranking. He's happy to fend off the rest of Wahab's over, opening his account with an inoffensive single to the cover sweeper.
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Richie O'Hara Beamand: Now to see if we can build another partnership, losing wickets in clusters has been our big problem, of late.
Liam Johnson: We'll be 120-3 in a few.
Ramiz Raja
Former Pakistan captain
"It was a soft dismissal in the end - he wanted to get a bit of elevation but it hit the toe of the bat. But he's played a good innings, the platform has been set, and England can think big now."
Roy c Malik b Wahab 54 (Eng 102-1)
Image source, AFPJason Roy doesn't make it to drinks - as just when he was going so well, he chips a fairly straightforward catch to mid-on, having made 54 from 57 balls. Replays show it was a cunning slower ball from the left-armer which deceived Roy. Stand by for the Twitter backlash as they players take drinks...
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Image source, Getty ImagesPete Naylor: Somebody said we should have dropped Jason Roy after the last ODI. Yeah, talk nah mate...
We almost had a drinks break there, but the 12th men and the ground staff were shooed off. Looks like we're having one more.
Ramiz Raja
Former Pakistan captain
"This is good cricket by England - hitting boundaries and playing with a bit of flair. In the last match, they were in a strong position then they nosedived; they just have to keep this momentum going."
Hales joins in the fun, slog-sweeping Shoaib Malik for four through deep backward square leg and then punching him for four through the covers when the off-spinner drops short. Two singles bring up the century stand. Fair to say England are in third gear at the moment... but with no wickets down, when do they move up to fourth?
Ramiz Raja
Former Pakistan captain
"Roy has looked in top form in this innings, and what a good way to get to 50: on the front foot, completely in control."
Eng 90-0
Roy reaches his third ODI half-century from 53 balls, guiding his eighth four towards cow corner. He's clapped by the England players and staff on their balcony, though they remain seated for now.
Jonathan Agnew
BBC Test Match Special
"Hales is clearly a strong contender to open in the South Africa Test series, but he does have a tendency to edge outside the off stump that worries me."
Wahab Riaz has had a change of ends, the ball keeps low as Roy has a big heave-ho and the bowler and batsman exchange big grins. When he does connect, he drills another four through extra cover. The Pakistan fans on the grassy bank, some wielding enormous pandas and teddy bears, are urging their side on, but it's been England's morning so far.
England 82-0 (15 overs)
Batsmen: Roy 44* (48), Hales 35* (42)
Bowling figures: Irfan 4-0-16-0, Anwar 3-0-12-0, Yasir 4-0-23-0, Riaz 2-0-15-0, Malik 2-0-15-0
England won toss
Pakistan lead series 1-0
Three more singles mean England reach the first hour of play - and the Shipping Forecast - without losing a wicket. Can't remember the last time that happened.
tms@bbc.co.uk
Matt in Twickenham: Roy and Hales seem to enjoy batting together, could this be the key to a successful open partnership? Looking back Hayden/Langer, Cook/Strauss, Greenidge/Haynes, Attapatu/Jayasuriya all had great relationships and succeeded. Could this be worth thinking about when selecting our next Test opener? Just a thought.
Image source, Getty ImagesJason Roy gets the reverse sweep out of his locker, this time it's all along the ground and they run a two as the tumbling Babar Azam - set to be promoted to open the innings today - does the fielding. An inside-out lofted off-drive brings him four more, taking his tally to 42 from 46 balls.