hard to believe it was Paul it doesn't even sound like him, just like it doesn't sound like him on the 'AAAAAHHHHH' in "A Day In The Life". We should start a topic on that...
It's John. He liked that phrase, he used it in a number of interviews...
f***ing hell isn't a phrase, it's an expletive.Any of the Beatles could say it in a moment of anger or disappointment.
Um, whatever.
God, you're splitting hairs now. Phrase, expletive, whatever. Some people DO use certain expressions, curse words, whatever, with more frequency than others. It can become a habit. So if there's proof that this person uses that 'expletive' quite a often, then there's a basis for assuming it's him saying it in this case too.