He has spoken several times of the difficult decision he made to quit Oasis in 2009. The band was his life and the choice not made lightly, but ending things then was the best thing for everyone, he told Sky Arts a few years ago. The fact they didn't continue was a big part of the reason they are now "up there with all the greats".

The older Gallagher brother was well aware the years apart - the brothers' often funny but frustrating feud, the unanswered question of whether they would ever bury the hatchet and the hope that maybe, one day, it might just happen - all amplified their legend.

Rumours have come and gone over the years, propelled in no small part by messages from Liam Gallagher on social media. He often teased, but never made any secret of wanting to bring Oasis back. The sticking point seemed to be Noel.

But in 2022, Liam played gigs at Knebworth - the site of Oasis's most famous, history-making gigs. Earlier this year, he got in early to mark the anniversary of their debut album Definitely Maybe with his own solo tour, no sign of the man who wrote the songs.

Noel created the music, Liam brings it snarlingly, viscerally alive. Him doing these shows alone felt like it could be a death knell for a reunion. When asked about Liam by a fan during one of his shows with his current band, the High Flying Birds, only a few weeks ago, Noel reportedly said his younger brother should be "thankful for my genius" and told the crowd: "Just remember who wrote all the f***ing songs."

'They hadn't spoken in goodness knows how long'

Even the new artwork for Definitely Maybe (pictured above), released for the 30th anniversary this week, shows a reworking of that famous album cover - shot at guitarist Bonehead's house in Manchester - this time with the band members absent from the room. With no Liam on the floorboards, no Noel staring up at the spinning globe, it felt like a statement: Oasis really have left the building.

Designer Brian Cannon, who worked on the artwork for all of Oasis's early music and now runs the Microdot memorabilia stores, says he was as surprised as anyone by the reunion announcement.

"A lot of people say to me, it's all a big marketing ploy," he says, of the brothers' fall-out. "No, it isn't, they genuinely hadn't spoken to each other for goodness knows how long. And Noel's got a very successful solo career that he's very content with and doing very well. I didn't see this coming, I really didn't."

Photographer Michael Spencer Jones, who captured the images for all the Oasis albums and singles in the band's heyday, says the sibling rivalry was always there. "It's such a major part of the potion that was Oasis."

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But there have been whispers for months now, reports from industry insiders saying it was only a matter of time. In January 2023, Noel announced his separation from his now ex-wife Sara MacDonald, who did not get on with Liam, leading to speculation he might become more open to making amends.

More recently, following reports of shows booked for Wembley, fans have once again pointed to teases from Liam on social media - "I never did like that word FORMER" he posted on Sunday morning - and a recent interview given by Noel in which he spoke in complimentary terms about his little brother's voice: "When I'd sing a song it would sound good. When he'd sing it, it would sound great."

Neither of these things made a reunion a certainty. While Noel may not have liked his brother at times, he never underestimated the shared power their bristling sibling rivalry brought to Oasis. "I wouldn't have gotten anywhere without him, he wouldn't have got anywhere without me," he told journalists at an awards ceremony in 2019.

'The stars have aligned' - but statement gives little away

Oasis in their heyday were like no other live band. The shows were electrifying, the energy raw, in an era of optimism and fun in the 1990s that the Gallagher brothers defined. In later years, Noel may not have been a fan of the Cool Britannia tag, but that's exactly what it was.

So now, will this reunion just be about the gigs? Will there be new music? Could the Gallagher brothers even be friends again?

The reunion statement gives little away. "The guns have fallen silent. The stars have aligned. The great wait is over. Come see. It will not be televised." Further details say there was "no great revelatory moment", but rather "the gradual realisation that the time is right" - but the Gallaghers have not really addressed the fact they haven't been on speaking terms for years. We want to know who reached out first? How did they finally come to an agreement? And what did their mum, Peggy, say about her sons finally getting their acts together?

Whatever has happened behind the scenes, the frost has definitely thawed. In 2020, Liam said Oasis had been offered £100m to reform - a claim quickly denied by Noel, who suggested the remark was a publicity move to promote a single. The deal they have signed now will undoubtedly be worth megabucks. But even before the announcement was made, Liam was quick to put anyone suggesting this was only about the money in their place.

"Your attitude stinks," was his reply to anyone questioning the motives. Positivity received a different response. "Your attitude is BIBLICAL."

You only have to look at the crowds at Liam's solo shows - full of teenagers, as well as those of us who were there the first time round in the 1990s - to see how the music has filtered through generations. The singer has said several times he would like younger fans to see the full Oasis live experience.

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Now, they just have to deliver.

"There's two schools of thoughts on this and at one time I would have fallen into the latter," says Cannon. "One being: great, yes, fantastic. The second: no, leave it be, let it lie, it's gone, you might tarnish the past.

"But. We're living through strange times in this country at the minute, globally as well. There's a lot of division, recent events have been quite shocking. [A reunion] will undoubtedly bring a lot of happiness to a lot of people and I'm all in favour of a lot of people being happy. So, yeah, it's got to be a good thing."

"There should be an album, I think," says Spencer Jones. "It would be great if there was more music to come."

Next year marks the 30th anniversary of their second album, (What's The Story) Morning Glory? Both Noel and Liam will be well aware of the expectation, how much these shows mean to fans. Get them wrong, and there's the potential for the legacy, the memories, to be spoiled.

Get them right, and Oasis live forever all over again.