Despite an original release date of late 2014, U2's as yet untitled new album and subsequent tour have been delayed until 2015.
According to sources, a variety of factors have contributed to the delay, firstly the band haven't been able to find enough time to get into the studio and record. Secondly the source added that the older the band get, the longer it takes them to record an album because it takes longer to summon up that "magic", reports Billboard magazine.
"It seems to be taking longer or them to finish an album as they get older, but the great thing about U2 is that the whole of a record is always better than the sum of its parts," the source said. "That magic that the band always seems to capture.they have yet to capture it," they added.
Listen to 'Invisible' by U2 below
The band previewed the first part of new material during an advertising spot at this years Super Bowl. The track entitled 'Invisible' was then put up for sale with donations going to charity for each time the track was bought for 24 hours.
Describing what fans can expect from the new album, Bono said that the influence of krautrock features very heavily. He also has said in interviews that the band are bordering on the edge of irrelevance, an observation that may be contributing to the delay. He told Zane Lowe that it was hard but that fans could expect something special.
"Until it's on the radio or online, it's not real," she said. "With U2, our album isn't finished until it's in the stores. It's tricky getting us four boys across the line. I think our band has something and [fans] know we don't just put albums out. We do think about it."
Below: U2 Play Historic Gig In Moscow, Russia