Root's finishes with 133 off 129 balls
Hales makes 95, Morgan unbeaten on 75
Tamim top-scores for Bangladesh (128)
Plunkett is England's best bowler (4-59)
Watch full highlights on BBC Two at 23:20 BST (UK only)
Jonathan Agnew
BBC Test Match Special
The umpire is having a word with Ben Stokes. I wonder what the umpires have been told. Does it have to be a sledge-free tournament or something?
In terms of what we have seen over the years this is pretty mild. The Bangladeshi fans in the crowd are really getting stuck in to Stokes now, who turns and asks for plenty more!
Sledging has officially turned up to the Champions Trophy.
Tamim plays and misses at a leg-cutter. Next up is a slower ball and it's guided down to the third man boundary for four.
Stokes has some words for the opener, who at first doesn't seem interested in getting involved.
But he then gestures to the English all-rounder to walk back to his mark and get on with it.
Cheeky! Umpires now getting involved.
Alec Stewart
Ex-England captain on BBC Test Match Special
Bangladesh are on course for 300-plus. Yes, it's a short boundary but a score in excess of 300 instantly puts pressure on the chasing side.
#bbccricket or 81111
Jack Harrison: All those pre-match who were writing them off, take note: Bangladesh are much stronger than they used to be with bat and bal
Joe Gibney: Typical England. Start the best sports party (cricket, rugby) then do their best to get thrown out early even as host
'There's a quick one right on your chops, how'dya'like that?' is what you'd imagine Mark Wood would like say to Tamim after the first delivery of this over.
The Bangladeshi didn't look too confident trying to play that short one.
Three off the rest of the over, a good one from Wood.
Jake Ball, giving everything he has to stop the second of consecutive boundaries, does not see the advertising boards in time to stop his forward momentum.
Tamim turning the screw on Plunkett.
Stephan Shemilt
BBC Sport at The Oval
Image source, Getty ImagesMiles, miles more noise being made by the Bangladesh fans than the home supporters at The Oval. There's a corner of the ground, underneath the pavilion, that is almost exclusively Tigers. Green shirts, flags, exploding with noise every time the ball crosses the boundary. They are getting plenty to cheer too - a big score is on the cards.
But some wear suits
The wonder of social media in full effect here.
You may recall that at 11:52 we posted a plea from Andrew Haskins, a man in possession of tickets for hospitality at The Oval, but not of clothes which meet the dress code.
We can all sympathise I'm sure.
Well, David Court has stepped up to the plate, but our man still needs some shoes, trousers and a shirt.
Who can help out?! Let's make this happen everyone...
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Stokes again.
Oooh, a cut from Mushfiqur falls just short of the point fielder.
Another oooh when Root has a shy at the stumps as the Bangladeshi batsmen tun through for a single. I think he would have made it in.
The score predictor is saying Bangladesh are on course for 290.
A competitive score but I reckon they could get a lot more than that.
Phil Tufnell
Ex-England spinner on BBC Test Match Special
England need to stop Mushfiqur playing that dab shot to third man. He's knocking it down there to get off strike, and it's letting him off the hook at times. Make him cut it rather than glide it.
Mark Wood is back into the attack.
It wasn't long ago we were talking of Tamim's slow scoring rate.
Well he's picked it up now, another pull pierces the leg-side field for four.
Remember, Chris Woakes has left the field with what is understood to be a side strain and is unlikely to bowl again. The England bowlers will have to put a shift in now.
Dan Norcross
BBC Test Match Special
A big score from Bangladesh here and England will feel the pressure. They've got to face Mustafizur for the first time. He's never gone for more than 4.5 an over in his first match against another country.
For anyone who thought this would be an easy opening match for England, you were wrong.
The 150 is up.
Stokes shares some words with the umpire, not quite sure what that was about.
Tamim Iqbal decides it is time to put some pressure on Moeen, skipping down the pitch to fire a big six in to the crowd.
Stokes doesn't get his line right and Mushfiqur elegantly pulls a wide ball and it races through to another boundary. This lad can bat.
Andy Zaltzman
BBC Test Match Special statistician
These two now have their 50 partnership off 48 balls.
Moeen continues and races through another one.
He's been fairly economical so far but goes for seven this time.
A beauty of cut from Mushfiqur earning him three runs is the highlight of this over.
#bbccricket or 81111
Jibin Mathew George: England need some wickets. And soon. Iqbal and Rahman are the kind of batsmen who'll run away with the game if well set.
Jov4: Think Plunkett can be a real driving force with bat and ball this tournament. Fingers crossed
Another expensive over.
Glorious pull from Tamim - he's getting the skates on. A shortish delivery and textbook from the opener.
What's next? A four driven straight down the ground. Jake Ball can't quite chase it, and in attempting to do so he falls over the advertising boards.
The last thing England need here is another injury.
Some top-class Richie Benaud nostalgia on TMS currently. What a man.
That's halfway through the Bangladesh innings.
Here's Kal Sajad to take you through the next passage of play.