Radiohead members get on with each other like brothers, drummer Philip Selway has said.
"It is a very strong bond in there," Philip said.
"It's not like a group of friends. It's not like a group of colleagues. It is much more akin to a sibling relationship where you have all these common experiences."
He went on: "It dates right back to when we were all at school together. You've been through all those life changes together, effectively from being boys to toying with the idea of being adults, and sticking, actually, to being boys again."
Philip is set to release his first solo album, called Familial, which sees him take to the mic as vocalist. He's enlisted Wilco's Glenn Kotche as drummer.
He said: "Three or four years ago was when I actually really decided to make a record. I had little fragments of songs coming together in the years running up to that, and then it got to the point where, actually I could see a collection of songs emerging from it. Something that I actually felt had a particular character, which I suppose is me, in there. And stuff that wasn't that appropriate to Radiohead, either."
He's also working on Radiohead's next album, but said he had "no clue" about whether it would be released as a digital download, as In Rainbows was.
He said: "We've got to finish it, then we will find out what's appropriate to it, and what's appropriate in the music industry at the time because that changes at the drop of a hat."