Noel and Liam Gallagher's brother Paul is convinced the feuding siblings will reunite Oasis - because they have "unfinished business" with the band. The band split in 2009 after guitarist Noel quit following a backstage fight with his younger brother, the group's singer. The Gallaghers have been estranged ever since and Liam even threatened to sue his former bandmate for remarks he made about the frontman. Both brothers have found success away from Oasis - Liam with Beady Eye and Noel has become an acclaimed solo artist - but their brother Paul insists fans haven't heard or seen the last of the Some Might Say hitmakers. In a new interview as part of an Irish TV documentary, he says, "I think they've got unfinished business. I think Noel regrets walking out the way he did. Liam was always going to carry on and do his own thing. I've got a funny feeling something might happen in the future, in two years' time, maybe three. "All it takes is two guys to say, 'You know what, I'm sorry, but I love you.' That's all it takes, it's not hard. It's easy." Both Liam and Noel have shot down reports suggesting they are secretly planning Oasis concerts next year (14) to mark the 20th anniversary of the release of the band's first album Definitely Maybe.