“Simply because it is one of the best songs ever written. Everybody knows the story about Paul waking up and thinking that the melody was something that somebody else had already written. That was in our house. I wasn’t there that day, but I think he played it for my mother and asked her if she knew what it was.
“He didn’t have the words at first, but there was the melody. I’d never heard it when it was ‘Scrambled Eggs.’ I never heard him sing it like that, but of course, I do know the story and how the lyrics evolved.
“Paul was being influenced by classical music, which partly might have been from being in our house, where classical music was very much part of the background – my mother being a professional classical musician. But Paul’s father was in a band, and so he knew lots of other instruments, not just guitars.
“The temptation would have been to schmaltz it up with a big orchestra. George Martin was an immense help with the string quartet. But part of Paul’s genius was that, once he understood what a string quartet sounded like and what it could do, he basically wrote those parts. He had a very clear idea of how it should go. It made for a masterpiece of a record in every respect – the arrangement and the production, along with the overall brilliance of the song.”