John was in constant need of proof of love and security and he was constantly testing people for that proof.

I didn't marry a Beatle, I married a broke student who played the guitar and ponced all my grant money off me for fags.

John and I weren't capable of getting back to Kenwood from there, so the four of us sat up for the rest of the night as the walls moved, the plants talked, other people looked like ghouls and time stood still. It was horrific: I hated the lack of control and not knowing what was going on or what would happen next.

I was proud, excited and a little frightened. It was all taking off so quickly…the more successful the boys were, the further away from me John felt. I was getting used to being a mum, but most of the time I felt like a single parent…it was hard not to feel frustrated with being stuck at home. I loved Julian, but I knew that if I hadn’t had him I could have seen much more of John and that was hard…I felt shut off from the life he was living. After years at his side, I was excluded, just as it was all happening.

I knew the man up until our divorce - after that I didn't know the man, but it didn't stop me caring about him and worrying because of the complete change that I saw in him. He'd lost his sense of humour and he got aggressive; he wasn't for the world any more, he was just for Yoko. Before that he opened his arms and embraced the world with his wit and humour - afterwards he was a completely different kind of person.

John was an extraordinary man. Our relationship has shaped much of my life. I have always loved him and never stopped loving him. That’s why I want to tell the real story of the real John – the infuriating, lovable, sometimes cruel, funny, talented and needy man who made such an impact on the world. John believed in the truth and he would want nothing less.

John needed to escape his reality. I understood completely but I couldn't go along with him.