LONDON : Sri Lanka completed a rare test victory in England on Monday as they reached their target of 219 with untroubled ease on the fourth day at The Oval, with Pathum Nissanka's unbeaten 127 leading them to a consolation win in a 2-1 series defeat.After their impressive end to Sunday's final session, Sri Lanka resumed at 94-1, needing a further 125 to win and knocked them off in a little over two hours to finish on 219-2 and win by eight wickets.Kusal Mendis had added nine to his overnight 30 before a brilliant running catch by Shoaib Bashir gave Gus Atkinson another wicket, but it proved the only bright note for England on an overcast south London day.Nissanka, who had hammered a quick 53 not out in Sunday's final session to set up the chase, was initially more controlled in his approach, but kept the scoreboard ticking and reached his second test century off 107 balls.He then cut loose with some big hits and, with the experienced Angelo Mathews also looking untroubled for 32 not out, Sri Lanka claimed their fourth test victory in 40 years in England, largely on the back of a remarkable Sunday turnaround when they bowled the hosts out for 156 in 34 overs.