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 was closest of all to Paul; their relationship was very complex.

When John was with me, it was total commitment. Whatever he did outside our relationship didn't seem very important. We were together such a lot of the time that whatever other affairs he had once we met couldn't have amounted to much because I was with him most of the time. He kept me in Liverpool as late as I dared stay.

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.

The first thing Julian wanted to do in life, well, before he wanted to be an artist and then a musician, was to be a chef. He'd come home and say 'Why don't you bake cakes like my friends' mothers?' I'd say, 'Oh, Julian, go out and buy a Mary Baker cake mix and do it yourself!' That started him off! By the time he was 13, he'd disappear into the kitchen whenever we had visitors and emerge with beautiful canapes. Now he thinks nothing of cooking for ten or 15 people, and he does it so calmly.

John asked me to dance and I nearly died. Bingo! I then amazed myself by being very cool, calm and collected outwardly-inside I was out of this world. The dance was slow and smoochy. I was aloof and John, I think, was slightly embarrassed. It was all very painful and beautiful at the same time. The remaining students were looking on with puzzled expressions at such an unlikely combination.

We were both sort of bowled over by the fact that we were married. It wasn't a question of 'Have we done the right thing?' It was all perfectly natural that we should be together. But John didn't get a real chance to be first a real husband or later, a real father. Once he got on the Beatles bangwagon he couldn't get off, even if he wanted to.