Liam Gallagher is angry. It's not the Oasis business meeting he has been in prior to this interview and it's not the phone calls from his girlfriend, ex-All Saints singer Nicole Appleton, mother of his son Gene, to unload grief over the purchase of a new flat they're buying in a swish part of London.
No, it's the story he's just heard about U2, one involving the band watching a tape of their live show after they've come off stage to make sure everything's in the right place.
"Wankers," Liam spits. "Haven't they got f... all better to do? I'd rather be out there getting pissed.
"I certainly wouldn't go back after a gig and analyse it. No wonder they're the biggest band in the world: 'Oh Edge, the fourth guitar solo wasn't right tonight'. 'Oh, sorry Bono'. If that's what people think rock'n'roll is ... "
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Liam Gallagher is the best rock star Britain has produced. Just ask him.
And he's still enjoying being Liam Gallagher, professional lad, now 10 years after (What's The Story) Morning Glory made them briefly the biggest band in the world. "This is the best job in the world," he says.
"It's even better when you're the best rock star."
His confidence is boosted by the new Oasis album, Don't Believe The Truth.
Noel Gallagher famously calls each new Oasis album the best since their 1994 debut Definitely Maybe. His younger brother is going one better.
"This is a classic record. Definitely Maybe's an alright record, people just have this love affair with it because it's the first record. I think the songs are better on this record but it's the sixth album and we're waning to some people and they think we're not as great as we used to be, all that nonsense. This album's better than the first two."
The band started work on Truth early in 2004, with Noel deciding to return to the small studio they recorded Definitely Maybe in almost 10 years to the day. Liam's friends, dance act Death In Vegas, were hired as producers.
On paper, it looked brilliant – Oasis could update their sound.
In reality, it didn't work so well.
"That studio was a s...hole then and it's f...ing worse now. Been there, f... that. We went there, it was rubbish, Noel didn't give Death In Vegas much time, he got his ball and went home. That was it."
With Death In Vegas's exit went Oasis's modernisation.
"They'd make a great Oasis record," Liam notes. "They'd make the record people want us to make. It's whether we want to make it or not, whether we want to change our sound ... I like our style. I just want to make a great rock record. I don't want to write loads of weird s... I don't want anyone stroking their beard listening to our music."
A performance at last year's Glastonbury Festival saw Oasis roundly criticised for a lazy performance and lacklustre new songs.
"It wasn't the songs, it was the studio," Liam clarifies. "It was rubbish. The songs were great, some of them are still on the album. We wouldn't have gone into the studio with s... songs. We don't write s... songs."
Take two of the album saw Noel in the production chair "which was f...ing stupid, because he's not a producer" according to Liam.
Third time lucky: the band decamped to LA and found success with Dave Sardy (Jet, Marilyn Manson).
Noel – once the sole author of Oasis songs – only wrote half of the new record.
Band members Andy Bell and Gem Archer wrote one song each, Liam did three.
"We could all always write songs, but the songs we wrote back then weren't good enough. Noel's not suddenly let us into the world of songwriting. I'm writing some classic songs," Liam says.
"Now I'm f...ing mega."
One of Liam's tracks, Guess God Thinks I'm Abel, Noel has already claimed to be an apology to him from his little brother.
"I've got absolutely nothing in this world to apologise to him for. Nothing at all."
And with that, it's game on.
So how are things between he and Noel? Noel has been slating Liam in interviews lately.
"He's always slagging me off in the press. That's him. His interviews are boring, he has to talk about me, has to bring me into it. Liam this, Liam that. Liam kicks up a fuss in the studio. I'm the most f...ing chilled out one in the studio, it's him that recorded the album four times, not me."
Noel recently stated that Liam has a new goal – songwriting – which will make him remembered for more than being the guy who got his two front teeth knocked out in an altercation in Germany in 2002.
"I've done a lot more than to (only) be remembered as the guy who got his teeth knocked out," Liam says. "I'm the best f...ing rock'n'roll singer this country's ever had."
So does he think he is respected? "My fans give me respect. I don't give a f... about anyone else."
But what about Noel? He says he had to coax vocal performances out of Liam on this record.
"I said to him 'Now you're trying to tell me how to sing the f...ing songs? Why don't you sing it? Don't tell me how to attack a microphone. This is what I do. You write the f...ing songs and I sing them."
So does he have any respect for his brother?
"I do, but he says some silly things. We don't fight anymore. We just do it all with looks (demonstrates killer glare) and I'm winning at the moment."
Don't Believe The Truth is out on Monday.