Root 168*, Buttler 7*
Root's first Test hundred since 2019
Lawrence 73 on debut
Root & Lawrence add 173
Bairstow 47 - falls in second over
Three wickets for Embuldeniya
Rain wipes out evening session
First Test, day two, Galle
Two-Test series postponed from March
Andy Zaltzman
Test Match Special statistician
Dan Lawrence's half-century came from 95 balls with one six and five fours.
He is the 76th England player to make a half-century in the first innings of his debut Test. The last was Ben Faokes, also at Galle, in November 2018.
Lead by 98
Dasun Shanaka starts with a maiden.
Mickey Arthur is laughing and joking in the changing room now. At least he can see the funny side...
Dasun Shanaka is coming into the attack with his medium-pace dobbers for the first time in this innings.
Andy Zaltzman
Test Match Special statistician
Joe Root's century came from 163 balls with seven fours. It his 18th in Test cricket, his third against Sri Lanka and his first in 10 Tests.
Jonathan Agnew
BBC cricket correspondent on Test Match Special
The captain performing takes any pressure off. He's always the first one to be scrutinised.
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Phil Tufnell
Former England spinner on BBC Test Match Special
What a great start for Root with this extravaganza of cricket coming up.
Joe Root's first century since November 2019 was slightly overshadowed by Mickey's nightmare after it but here's some reaction...
Lead by 98
Just to make the whole Mickey Arthur thing worse - he threw his water bottle to the floor and then brought out the teapot. He genuinely thought that was out. Worrying.
The century partnership is up between these two, in just over 26 overs, and England's lead is approaching three figures.
Phil Tufnell
Former England spinner on BBC Test Match Special
Lawrence has looked completely at home. He will be absolutely delighted. What a feeling.
Simon Mann
BBC Test Match Special
That's a great moment for Dan Lawrence.
A half-century on debut for Dan Lawrence!
He does it with consummate ease down the ground and he doesn't even realise he's brought it up.
The England dressing room starts applauding, he looks up at them, and then realises.
He wants this to just be the start.
Dan Lawrence is back on strike, on 49...
Simon Mann
BBC Test Match Special
That just straightened. It would have been a big shout for lbw had Dan Lawrence not got some under edge on it.
#bbccricket
Matt Mehdi-Daley:I think Micky Arthur is desperate, maybe trying the 'One hand, one bounce rule'
Nick Roberts: Mickey Arthur fought the Law and the Law won.
Rachel T: Does Mickey Arthur know you have to score MORE runs than the opposition in order to win?
Lasith Embuldeniya has bowled nicely for Sri Lanka. He gets another one to grip, and turn away from Dan Lawrence, which Niroshan Dickwella ends up taking at chest height away to his right.
Lawrence under-edges a sweep for two, before a couple of singles through the covers. He's up to 48 on debut.
His footwork has been excellent so far.
#bbccricket
Nick White: It’s seems my 4-year old lad understands the laws of cricket better than Mickey Arthur.
Matt Bartlett: The irony of Mickey Arthur not doing his homework on the laws of cricket...
Jonathan Agnew
BBC cricket correspondent on Test Match Special
There's a new ball due in 14 overs. I'm not sure if Sri Lanka will be pleased about that or not.
The ball is spinning a lot more today, but England are coping with it well.
Another four added. They lead by 83.
#bbccricket
Owen: Surely everyone knows if it hits the ground first it's not a catch??!!
Dan Smith: No wonder SL are so bad; Micky Arthur doesn’t understand basic rules of cricket.