I'm a musician and a while back I was recording at Abbey Road Studios. I needed to go to the loo, which was at the bottom of a long corridor. Eventually, I found it and was about to enter when I felt a draft behind me. I turned to see a lean chap, wearing a fedora, waistcoat and shirt. He smiled, waved and slid through the door.
I ran back to the studio and told everyone what I’d seen and the engineer said, ‘Oh, that's George’. Former Beatle, George Harrison, apparently had offices down there and returns frequently.