I did a search and it wasn't too hard to find. My guess is it was deliberate.
"In a recent interview with Rolling Stone magazine, Coldplay front man Chris Martin has admitted to plagiarizing many, if not most, of the songs he wrote. Specifically, Chris said:
“We’re definitely good, but I don’t think you can say we’re that original,” he notes. “I regard us as being incredibly good plagiarists.”
In another article, the song “Fix You” was specifically mentioned as being a copy of Elbow’s “Grace Under Pressure”. To that, guitarist Jonny Buckland had this to say.
“We’ve never so directly stolen off anyone before. We’ve never paid for our plagiarism.”
http://www.plagiarismtoday.com/2005/...ts-plagiarism/