England dominate Sri Lanka after Atkinson's maiden Test century
Joe Root's record-equalling 33rd red-ball century had ensured England ended a difficult opening day with a chance to build a commanding lead, and they did just that early on as Atkinson took centre-stage.
Resuming at 74 not out, Atkinson brought up his maiden Test century with a fine drive past mid-on shortly before lunch, eventually ending his knock with 14 fours and four sixes.
He would later fall for 118 to the outstanding Asitha Fernando, who then completed a five-for by removing Olly Stone to wrap up the England innings at 427 all out.
Any hopes Sri Lanka had of making an early dent in that target were frustrated, however, as England shared the wickets around in a brilliant team bowling performance.
Chris Woakes and Stone, who removed Dimuth Karunaratne and Pathum Nissanka within the space of five balls – left the tourists teetering at 35-3 by the end of the 10th over, and there was little help to come from the middle order.
Matthew Potts took the ball and sent stumps flying to account for Angelo Matthews and Dhananjaya de Silva in the 21st over, with Woakes, Stone and Atkinson later also doubling up as the tourists collapsed.
Kamindu Mendis' steady knock of 74 off 120 balls brought some respite for Sri Lanka, but he edged Atkinson's delivery into the palms of Woakes for the final wicket, failing to match his ton from the first Test at Old Trafford on a miserable day for the visitors.
England then avoided any drama when taking up the bat for seven overs before stumps, and Ben Duckett (15) and Pope (2) will resume at the crease on Saturday, hoping to make their handsome lead an unassailable one.
Data Debrief: Atkinson's big moment
While Root's heroics put England in a decent position ahead of Friday's play, Atkinson's brilliant 118 – coming off 115 balls – could prove the difference in this Test, allowing England to build a strong lead despite a lack of support from the lower order.
Atkinson's previous best red-ball knock was a score of 21 not out versus West Indies at Trent Bridge in July.