Bairstow repeatedly helped England recover from top-order collapses and Cook likened his contribution to that of retired former England wicket-keeper Matt Prior. “He’s very similar to Matt Prior…when he was at his best, we would often be 100 for five and he’d change the momentum,” explained Cook.Prior’s wicket-keeping came under intense scrutiny early in his career, especially since England have long prided themselves on their glovemen, from be it Alan Knott, Bob Taylor or Jack Russell.Bairstow, himself the son of the late former Yorkshire and England wicket-keeper David Bairstow, has also found his work in the field being called into question after he floored a couple of seemingly straightforward chances against Sri Lanka.”Jonny is enjoying both roles,” said Cook. “He knows how hard he has to work at his keeping — that is a conversation we do have,” added the captain, who has been able to observe Bairstow’s work closely from his position at first slip.Bairstow, meanwhile, was pleased at maintaining the form he showed in South Africa, where his 150 not out in Cape Town in January gave him a maiden Test century. “Off the back of South Africa, it was important to start the summer well,” he said. “I hope this is just the start of something that will be special for a while.”Meanwhile, Sri Lanka captain Angelo Mathews would hope that his side, having had time to adjust to English conditions, will raise their game in the white-ball formats. However, the all-rounder accepted England were a much improved ODI team from the side that Sri Lanka thrashed by nine wickets at last year’s World Cup in Wellington. “They play positive cricket and you have got to be on your toes and really good to beat England in the ODI series that’s coming up,” Mathews said.