Whenever John Lennon visited George and me at our home in Esher, our cleaner, Margaret, would say to him 'Have you got any of those lovely pills?' and John would give her an upper. Afterwards she would vacuum like a maniac.

None of us used heroin but we took acid – LSD – regularly. Our dentist, John Riley, had turned us on to it.

He and his girlfriend invited John, his wife Cynthia, George and me to dinner at his house in Hyde Park Square one evening in 1965. We knew him quite well and had been to a few clubs with him in the past. The four of us drove to London in my little Mini Cooper S.