England declared on 322-6 - lead of 461
Hosts survive seven overs unscathed
Jennings 146no - his second Test ton
Stokes hits three sixes in brisk 62
Spinner Herath 2-59 in his final Test
In total England added 101 runs in that session for just the loss of one wicket.
Ben Stokes made an excellent 62 and was the only England batsman to be dismissed.
This morning they struggled a little in losing Rory Burns and Moeen Ali in poor fashion, plus Joe Root.
Jonathan Agnew
BBC cricket correspondent in Galle
England just got their heads down and played in that session. Jennings will have a cup of tea and change his shirt. He should feel on top of the world because of the message he has sent.
There will be question marks about his technique against quick bowling, he is a bit stiff and upright, but against the spin he plays it very well.
It has almost been a Cook-like innings
Keaton Jennings has gone 23 innings and almost two years without a Test hundred.
He has not scored one since his debut in Mumbai.
Good luck getting him to eat anything in the next 20 minutes.
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Lead by 351
Not to be.
Again Jennings picks out the fielder.
Keaton Jennings goes to tea on 98 not out.
Almost.
A sweep. Jennings picks out the fielder.
Two dots.
There might only be three more balls before tea.
Jennings 98, Buttler 14
Well done, Jos.
He gets one.
Over to you, Keaton...
Sri Lanka are taking an age to start this next over. Are they trying to make sure there's only one more before tea?
Jennings could be made to wait.
Text us on 81111
Would solve some of the issues about playing too much cricket too...
Should Jennings' success here (plus Broad's omission), and the growing gulf between home and away conditions/results mean we should have one home team, and one touring team?
Toby, London
Jennings 98, Buttler 13
Another sweep. This one conventional. One more to Jennings' total.
Jos Buttler rudely steals the strike at the end of the over.
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Jennings 97, Buttler 12
Still Jennings tries to reverse sweep. The Sri Lankans appeal for lbw. Not out.
Jennings 97, Buttler 12
Oooooof. A quicker delivery from Dhananjaya causes my heart to skip a beat. For a minute I thought Jennings was going to cut but he just got the bat down in time to block.
He'll be on strike for the next over.
Lead by 346
He's edging closer. Another easy drive from Jennings takes him to 96. Can he get there before tea?
Jennings 95, Buttler 11
There should be no pressure on Jennings to do anything similar to what we have just seen from Buttler. He has hours to get to three figures.
He still reverse sweeps to Herath but that's a routine shot for the opener.
But that's a missed chance! In two ways not just one.
Buttler goes again and this time he inside edges onto his pad and through to the keeper.
It would have been an outstanding catch or stumping but he managed neither.
Boom. This is what Sri Lanka will be fearing.
Jos Buttler skips down and bangs Dhananjaya de Silva for six.
The England 200 is up.
Jennings 94, Buttler 5
Jennings moves to within one hit. There are just under 20 minutes until tea.
Jonathan Agnew
BBC cricket correspondent in Galle
The two Ts for Keaton Jennings, technique and temperament, he has applied himself and played a fine innings.
There is still the questions over him facing fast bowlers but this will do his confidence the world of good.