Sean O'Brien believes blowing a Grand Slam in Wales 'might not have been the worst thing in the world ' as Ireland eye the World Cup after retaining their RBS 6 Nations title . Leinster flanker O'Brien grabbed two tries as Ireland thumped Scotland 40-10 at Murrayfield to claim back-to-back Six Nations titles for the first time since 1949 . The 28-year-old backed up scores from captain Paul O'Connell and centre Jared Payne as Ireland denied England the title by virtue of points-difference . Sean O'Brien of Ireland celebrates with the Six Nations trophy after the 40-10 win over Scotland on Saturday . England saw off France 55-35 in a madcap Twickenham encounter , but fell foul of the triple-bill Super Saturday set-up for the second year running , six points short on the target set by Ireland . Happy to embrace hindsight with the title secure for another year , O'Brien believes defeat to Wales must now act as a harsh World Cup lesson for Joe Schmidt 's men . 'Looking back now it might not have been the worst thing in the world , ' said O'Brien , of Ireland losing 23-16 in Wales to spoil their Grand Slam chase . 'We know we can learn and move forward . That was the biggest thing to come out of last week : that we did n't do our jobs correctly and we did n't do what we did during the week . Sean O'Brien of Ireland goes over to score the second try in a 40-10 win at Murrayfield . Ireland 's O'Brien scores a try during the 2015 RBS Six Nations match at Murrayfield on Saturday . 'If we approach the game like we did today , for instance , make sure everyone is going 100 miles an hour , we know we are never too far away . ' Ireland 's third Six Nations triumph in six years tees head coach Schmidt 's men up nicely for the autumn World Cup in England . Schmidt 's impressive transformation of Ireland 's fortunes raises hopes that his side can reach a first World Cup semi-final later this year . Head coach Schmidt 's ultra-tactical approach came under fire after defeat in Wales , with Warren Gatland beating his Kiwi compatriot at his own game . Scott Williams goes over during the 23-16 victory over Ireland , which ended their Grand Slam challenge . Ireland rediscovered their attacking rhythm in Edinburgh however , their four tries against Scotland matching their previous tally for the entire tournament . O'Brien is adamant Ireland can play whatever brand of rugby required to get the job done under shrewd boss Schmidt . 'There has been a lot of talk about the style of play the last few weeks but defences in this competition are very strong , ' said O'Brien . 'With analysis and what not , they are able to close people down and the quality of player and strength in depth , you have really good players playing against you . Captain Paul O'Connell holds aloft the Six Nations trophy after Ireland were crowned champions . 'You have to bring them to a place where they are under a lot of pressure and maybe we have n't done that in the last few weeks . 'But we can be very proud of ourselves today of how we approached the game and did our business . ' I would n't say it was a different style ( against Scotland ) . 'We have been trying to play a bit like that the last few weeks but we have n't been , and we 've let ourselves down at times with our own errors as well , letting teams into games . 'But we approached it the right way against Scotland , did our jobs , and it paid off . ' The Irish squad celebrate their Six Nations success as fireworks are set off from within Murrayfield .
Ireland crowned 2015 Six Nations champions after dramatic final day . Joe Schmidt 's side beat Scotland 40 - 36 to get into their premiership . England 's 55 - 35 win over France not enough for Stuart Lancaster 's men . Ireland lost their Grand Slam chances losing 34 - 16 to Wales in fixture four .